State Recognition And Succession In International Law

Introduction

State Recognition sits at the point where legal status, political judgment, and territorial change meet. It determines how existing States and international organisations respond when an entity claims statehood, when a government claims authority to represent a State, or when a territorial rupture creates uncertainty over rights and obligations. The issue is not symbolic. Recognition affects treaty relations, diplomatic protection, immunities, access to courts, control of public assets, and participation in international institutions (Lauterpacht, 1947; Crawford, 2006).

The first question is not recognition, but statehood. The Montevideo Convention identifies four classic criteria: permanent population, defined territory, government, and capacity to enter into relations with other States (Montevideo Convention, 1933, art. 1). These criteria remain useful, but they do not operate like a mechanical checklist. A territory may have institutions and population but lack broad international acceptance. A government may control territory while lacking legitimacy. A people may invoke self-determination while the parent State relies on territorial integrity.

Recognition becomes difficult because international law has never fully resolved its legal nature. The declaratory theory treats recognition as evidence of a status that already exists. The constitutive theory gives recognition a stronger role in creating legal personality. Modern practice sits between those positions. Recognition does not create a State out of nothing, but without enough recognition an entity may struggle to act as a State in ordinary legal life (Grant, 1999; Talmon, 1998).

State succession raises a separate problem. It concerns the legal effects that follow when one State replaces another in responsibility for the international relations of a territory. The Vienna Convention on Succession of States in Respect of Treaties uses that formula, but it does not mean that every treaty, debt, asset, archive, or claim automatically passes to the successor (Vienna Convention on Succession of States in Respect of Treaties, 1978, art. 2(1)(b)). Succession must be assessed by category, context, and legal effect.

The connecting concept is continuity. If the same State continues, succession does not arise in the strict sense. A revolution, coup, civil war, constitutional collapse, or temporary occupation may change the government without ending the State. By contrast, dissolution, separation, merger, absorption, decolonisation, or transfer of territory may require succession analysis because the legal responsibility for territory has changed (Craven, 1998; Aust, 2005).

This article argues that recognition identifies the legal subject, succession allocates the consequences of territorial replacement, and continuity determines whether succession is needed at all. The analysis avoids two common errors: treating recognition as mere politics and treating succession as automatic inheritance. The better view is that international law uses these doctrines to manage legal change while protecting stability, self-determination, territorial integrity, and the rights of individuals.

1. Statehood Before Recognition

1.1 The legal personality of States

A State is not simply a government, a territory, or a population. It is a legal person under international law. That legal personality allows it to hold rights, incur obligations, conclude treaties, bring international claims, enjoy immunities, own public property abroad, and participate in international organisations (Crawford, 2006; Klabbers, 2024).

This point matters because State Recognition disputes rarely concern symbolism alone. When other States disagree over statehood, the practical consequences are immediate. Can the entity sign a treaty? Can its officials claim immunity? Can it appear before an international court? Who controls embassy buildings, central bank reserves, aircraft, ships, archives, or diplomatic premises? Who represents the population internationally?

Legal personality also separates the State from the government of the day. Governments change; States usually continue. A revolution, coup, election dispute, civil war, or constitutional breakdown may create uncertainty about representation, but it does not automatically destroy the State. International law is cautious here because treating every collapse of government as the end of statehood would make legal order unstable.

Recognition should be analysed only after this basic point is clear. A claim to statehood asks whether an entity has international legal personality. A claim to the government asks who may speak for an existing State. Confusing those questions leads to weak analysis.

1.2 The Montevideo criteria

The most cited formulation of statehood is Article 1 of the Montevideo Convention on the Rights and Duties of States. It identifies four criteria: a permanent population, a defined territory, government, and the capacity to enter into relations with other States (Montevideo Convention, 1933, art. 1).

These criteria are useful, but they are not a mechanical checklist. They are legal filters. They help organise the inquiry, but they do not answer every contested case by themselves.

A permanent population does not require ethnic unity, religious unity, linguistic unity, or a minimum number of people. Micro-States show that population size is not decisive. What matters is the existence of a stable human community connected to the claimed territory.

A defined territory does not mean perfectly settled borders. Many recognised States have had unresolved frontiers. International law does not require complete boundary certainty before statehood can exist. It requires a territorial base over which public authority can operate (Shaw, 2021).

Government is more difficult. It normally requires an authority capable of performing public functions: maintaining order, administering institutions, representing the entity externally, and exercising control over the population and territory. Yet perfect effectiveness is not required. Weak States remain States. Occupied States may continue. Failed or fragile governance does not automatically erase legal personality.

The capacity to enter relations with other States is often misunderstood. It does not mean diplomatic popularity. It means independence: the entity must have the legal capacity to act internationally on its own behalf, rather than as a province, protectorate, puppet authority, or administrative unit of another State (Crawford, 2006).

1.3 Effectiveness and independence

Effectiveness asks a factual question: Is authority actually exercised? Independence asks a legal question: is that authority exercised in the entity’s own right?

The distinction is essential. An administration may control territory, issue documents, operate police forces, collect taxes, and maintain courts, yet still lack independent statehood if it is legally or militarily subordinated to another State. A puppet regime may look effective on the surface while lacking genuine independence.

The Tinoco Arbitration is often used to show that recognition by other States is not always decisive when assessing the legal effect of governmental acts. Chief Justice Taft looked beyond formal recognition and examined the reality of authority exercised in Costa Rica (Great Britain v Costa Rica, 1923). The case does not mean that effectiveness alone solves every recognition problem. It shows that international law often examines facts carefully before attaching legal consequences.

Modern practice is even more demanding where external control is present. An entity created, sustained, or controlled by foreign military power faces a serious independence problem. The same applies where local institutions exist mainly as an instrument of another State’s strategic control. A functioning administration is not enough if the real source of authority lies outside the claimed State.

This is why independence is not just another word for effectiveness. It is the legal quality that distinguishes a State from a dependent territory, occupied territory, proxy administration, or autonomous region.

1.4 The limits of pure effectiveness

Classical international law often gave great weight to effectiveness. If an authority controlled a territory and population, international law tended to treat that fact as legally relevant. Modern law still cares about effectiveness, but it no longer treats every successful territorial fact as legitimate.

The reason is clear: if effectiveness were enough, international law would reward force. A State could invade territory, install an administration, create a dependent entity, and then argue that effective control had produced statehood. That would undermine the prohibition on the use of force, the principle of territorial integrity, and the right of peoples to self-determination (UN Charter, 1945, art. 2(4); Friendly Relations Declaration, 1970).

Claims produced by aggression, unlawful annexation, racial domination, colonial denial of self-determination, or foreign military control face legal resistance. The ICJ’s Namibia Advisory Opinion is central here. The Court treated South Africa’s continued presence in Namibia as unlawful and required States not to recognise the illegal situation, while preserving certain civil acts necessary to protect the local population (ICJ, 1971).

The same logic applies to territorial acquisition by force. International law cannot allow recognition to cure an illegal annexation. Recognition has legal effects, but it cannot convert a serious breach of a fundamental rule into a lawful title.

Self-determination also limits pure effectiveness. Colonial peoples were not denied statehood merely because colonial powers controlled the territory. The law of decolonisation shifted attention away from imperial control and toward the legal entitlement of peoples to determine their political status (Western Sahara, 1975).

The result is a more balanced doctrine. Effectiveness still matters, but it is filtered through legality. Control gained or maintained through serious illegality carries weaker legal force.

1.5 Statehood without full recognition

Statehood and recognition can diverge. This is one of the hardest lessons in the subject. An entity may satisfy important elements of statehood yet lack broad recognition. Another may receive political support but still face legal doubts over territory, independence, or effective government.

Taiwan is the classic modern example of high functional capacity with limited formal recognition. It has a defined territory, permanent population, sophisticated institutions, and extensive external economic relations. Yet its international position remains constrained by the One China policy adopted by many States and by its exclusion from the United Nations system.

Palestine presents a different problem. It has broad diplomatic recognition and significant institutional participation, including observer status at the United Nations. At the same time, occupation, territorial fragmentation, divided governance, and unresolved final-status issues complicate the application of the Montevideo criteria. Its case shows that recognition may be politically and legally meaningful even where effective territorial control is incomplete.

Kosovo illustrates another variation. The ICJ held that Kosovo’s declaration of independence did not violate international law, but the Court did not decide that Kosovo was a State for all purposes and did not impose a duty of recognition on other States (ICJ, 2010). The opinion is often overstated. Its legal value lies in what it did not say as much as what it did say.

Northern Cyprus shows the opposite problem: effective local administration combined with severe recognition limits linked to the circumstances of its creation and continuing international objections. Somaliland also demonstrates the gap between internal effectiveness and external acceptance. It has maintained relatively stable institutions, but its claim has not translated into general recognition.

The divided German experience during the Cold War adds historical depth. The Federal Republic of Germany and the German Democratic Republic each developed international relations, but their status was shaped by occupation history, Cold War politics, constitutional claims, and later reunification. The example shows that recognition practice often follows political structures, while legal identity may remain contested.

These examples prove the main point of this chapter: State Recognition should not be analysed before statehood, and statehood should not be reduced to recognition. The serious method is sequential. First, examine legal personality. Then test the factual criteria. Then assess independence, legality, and self-determination. Only after that does recognition show its proper role: not as a magic source of statehood, but as a powerful legal and practical response to a contested claim.

2. The Legal Nature Of State Recognition

2.1 Recognition as a legal act

State Recognition is a legal act by which one State accepts that a situation has consequences under international law. The act may concern the existence of a new State, the authority of a government, title over territory, the status of belligerents or insurgents, or the representation of a State inside an international organisation. Its legal effect depends on what is being recognised and on the context in which the act is made (Lauterpacht, 1947; Crawford, 2006).

Recognition is not the same as political sympathy. A State may support a movement, maintain informal contacts, provide humanitarian assistance, or negotiate technical arrangements without accepting that the entity is a State. The legal question is narrower: has the recognising State accepted that the situation produces international legal consequences?

The object of the act must be identified with care. Recognition of a State concerns international personality. Recognition of a government concerns who may represent an existing State. Recognition of territorial title concerns sovereignty over land. Recognition of belligerency or insurgency, mainly relevant in older doctrine, concerns the legal treatment of organised conflict. Recognition of representation in an organisation concerns who occupies a seat, signs documents, votes, and speaks for the State.

This distinction matters because legal consequences differ. Recognising a State may support treaty capacity, immunities, diplomatic relations, and standing in litigation. Recognising a government may allow that authority to control diplomatic premises, bank accounts, treaty communications, or litigation on behalf of the State. Recognising territorial title may affect maps, consular practice, extradition, investment protection, and official dealings with local authorities.

2.2 Declaratory theory

The declaratory theory treats recognition as evidence of statehood, not as the source of statehood. On this view, an entity becomes a State when it satisfies the legal conditions for statehood. Recognition by others confirms or evidences that status, but it does not create the State.

Article 3 of the Montevideo Convention supports this position. It provides that the political existence of the State is independent of recognition by other States (Montevideo Convention, 1933, art. 3). The provision reflects a basic idea: legal personality should not depend entirely on the political discretion of existing States.

The strength of the declaratory theory is that it protects objectivity. If recognition alone created statehood, powerful States could decide who exists legally and who does not. Smaller or politically inconvenient entities would be placed at the mercy of external approval. The Montevideo approach resists that result by separating the existence of the State from the diplomatic choices of others.

The theory also explains why an unrecognised or partially recognised entity may still have legal duties. An entity exercising public authority over territory and population cannot claim total legal invisibility. It may be bound by human rights duties, humanitarian obligations, or rules protecting foreign nationals and property, depending on the circumstances (Crawford, 2006; Shaw, 2021).

The weakness of the declaratory theory is practical. It tells us that recognition does not create statehood, but it underestimates how much recognition affects the ability to act as a State. A legal person that cannot join organisations, open embassies, access courts, receive assets, or conclude effective treaties may exist in theory while facing severe functional limits.

2.3 Constitutive theory

The constitutive theory gives recognition a stronger role. It argues that an entity becomes a State only when existing States accept it as one. Legal personality is not complete until recognition occurs.

This theory captures an important reality. International law is a social and institutional order. States act through relations with other States. A claimant that no one treats as a State will struggle to exercise ordinary international rights. It may have institutions and territory, but without recognition, it remains blocked at the level of practice.

The problem is doctrinal fragmentation. If recognition creates statehood, then an entity may be a State for some States and not for others. That produces an unstable legal world. The same entity could sign valid treaties with recognising States, lack treaty capacity for non-recognising States, enjoy immunity in one jurisdiction, and be denied it in another. This is not impossible in practice, but it is a poor theory of general legal personality.

The constitutive theory also gives excessive power to political discretion. Existing States could deny legal personality to an entity that satisfies objective conditions, or grant recognition to an entity that lacks independence, effective authority, or legality. That would make recognition a political weapon rather than a legal judgment.

For that reason, the constitutive theory should be rejected as a complete explanation of statehood. It is more persuasive as a description of practical access to the international system than as a rule about the existence of a State.

2.4 The practical middle position

The better view is a practical middle position. Recognition is not legally constitutive in the strict sense, but it is often functionally constitutive in practice. It does not create a State out of nothing, yet it strongly affects the entity’s ability to operate as a State.

This position fits modern practice more accurately than either pure theory. An entity may satisfy many statehood criteria and still face major obstacles if recognition is limited. It may lack UN membership, diplomatic relations, access to foreign reserves, treaty participation, aviation arrangements, postal recognition, court standing, or institutional representation. The gap between legal existence and legal operation can be large.

Biafra illustrates the point. During the Nigerian civil war, Biafra claimed independence and received limited recognition, but it never achieved the degree of acceptance required to operate as a stable international legal person. Klabbers uses the example to show that recognition is deeply political and that factual control alone does not guarantee international acceptance (Klabbers, 2024).

This middle position also explains Kosovo, Palestine, Taiwan, Somaliland, and Northern Cyprus better than rigid theory. Each case shows a different relationship between effectiveness, legality, recognition, institutional participation, and geopolitical constraint. None can be solved by saying recognition is either irrelevant or absolutely creative.

Recognition works as a legal gateway. It does not supply all the elements of statehood, but it opens or closes many legal channels through which statehood becomes usable.

2.5 Express and implied recognition

Recognition may be express or implied. Express recognition is the clearer form. It may appear in a formal declaration, diplomatic note, treaty of recognition, joint communiqué, statute, parliamentary act, or official statement by the executive branch. Its advantage is precision: the recognising State openly states what it accepts.

Implied recognition is harder. It arises through conduct that reasonably indicates acceptance of legal status. Establishing full diplomatic relations, accepting credentials, concluding a broad bilateral treaty, supporting admission to an international organisation, or treating an entity as a State before a court may all support an inference of recognition.

Yet implications must be handled carefully. Not every official contact amounts to recognition. States often enter technical arrangements with unrecognised authorities because practical life requires it. Border crossings, health measures, humanitarian access, ceasefire arrangements, trade logistics, postal services, aviation safety, or consular assistance may require direct dealings without legal acceptance of statehood (Aust, 2005).

The intention behind the conduct matters. If a State expressly reserves its non-recognition position while dealing with an authority for practical reasons, the better view is that no recognition has occurred. International law allows contact without endorsement.

Courts have often treated recognition as a matter requiring clear evidence. Ambiguous conduct should not be inflated into recognition unless the conduct is inconsistent with any position other than acceptance of legal status. This protects States from unintended legal consequences and preserves space for practical engagement during crises.

2.6 Recognition and diplomatic relations

Establishing diplomatic relations is one of the strongest indicators of recognition. Diplomatic relations normally presuppose that each side accepts the other as an international legal person capable of sending and receiving diplomatic agents. The Vienna Convention on Diplomatic Relations rests on mutual consent between States, which gives diplomatic relations a clear legal character (Vienna Convention on Diplomatic Relations, 1961, art. 2).

This does not mean every contact with officials is diplomatic recognition. Meetings between representatives, liaison offices, trade missions, consular-style services, or participation in negotiations may fall short of full diplomatic relations. States often design these arrangements precisely to avoid recognition while preserving communication.

The difference is important. Diplomatic relations usually imply mutual acceptance of legal personality, immunity of diplomatic agents, inviolability of premises, official channels of communication, and representation at the state level. Technical contact may solve practical problems without accepting statehood or governmental legitimacy.

Recognition of governments also affects diplomatic relations. A State may continue to exist, but other States may dispute who is entitled to appoint ambassadors, control embassies, access bank accounts, or speak before international organisations. These disputes are about representation, not necessarily statehood.

The legal nature of recognition is best understood through this practical lens. Recognition is not a decorative diplomatic gesture. It is a legal act with consequences. But it must be read with discipline: identify the object, examine the wording or conduct, test the intention, and separate practical dealings from acceptance of legal status.

3. Recognition Of Governments

3.1 State and government recognition

Recognition of governments must be separated from recognition of States. A State may continue even when its government changes through election, revolution, coup, civil war, occupation, or constitutional collapse. The legal person remains the State; the dispute concerns who is entitled to represent it (Crawford, 2006; Talmon, 1998).

This distinction prevents a basic error. When an elected government is overthrown, international law does not normally ask whether the State has disappeared. It asks who can speak for that State, control its diplomatic missions, issue valid acts, represent it in courts, and participate in international organisations.

Government recognition is more flexible than State recognition because governments change more often than States. A decision to deal with a new authority may be driven by factual necessity, not approval. States may communicate with a regime to protect nationals, preserve consular access, negotiate ceasefires, or maintain humanitarian channels without accepting that regime as legitimate.

3.2 Effective control

The traditional test is an effective control. The authority that actually controls the territory, population, public administration, security forces, and external representation of the State is usually treated as the government that other States must deal with. The reason is practical: international relations cannot function if foreign States ignore the authority capable of implementing decisions on the ground (Aust, 2005).

Effectiveness is not a demand for perfect order. Governments may face insurgency, economic collapse, territorial fragmentation, or institutional weakness and still remain governments. The relevant question is whether the authority has sufficient control and a reasonable prospect of permanence.

Civil war creates the hardest cases. A recognised government may lose control over major parts of the territory while insurgents build parallel institutions. Foreign States must then decide whether to maintain recognition of the existing government, recognise a new authority, treat the situation as uncertain, or avoid formal recognition altogether.

The Tinoco Arbitration remains useful because it shows that recognition and effective authority do not always move together. Chief Justice Taft examined the factual operation of the Tinoco regime in Costa Rica, even though it lacked broad recognition (Great Britain v Costa Rica, 1923). The case does not make effectiveness conclusive, but it shows why legal analysis cannot ignore actual governmental power.

3.3 Legitimacy and constitutional order

Modern practice complicates the effective control test. A regime may control the capital, ministries, courts, police, and army, but still be legally contested because it seized power through a coup, relied on foreign intervention, suppressed democratic institutions, or obtained office through fraudulent elections.

International law has not adopted one universal rule requiring democratic legitimacy as a condition for government recognition. That would be difficult to apply consistently. States have different constitutional systems, and international law still rests heavily on sovereign equality and non-intervention.

Yet effectiveness alone is no longer enough in every case. Regional organisations, human rights bodies, and foreign ministries increasingly consider constitutional legality, democratic mandate, and respect for fundamental rights. The Organisation of American States, the African Union, and the European Union have all developed practices that resist unconstitutional changes of government, although their approaches differ in legal form and political strength (Roth, 1999; Talmon, 1998).

The tension is unavoidable. If foreign States recognise only effective rulers, coups may be rewarded. If they recognise only constitutional legitimacy, they may deal with authorities that no longer control the territory. A sound analysis must accept this tension instead of pretending that one test solves every case.

3.4 De jure and de facto recognition

De jure recognition accepts an authority as legally entitled to represent the State. It is the stronger form. It normally supports full diplomatic relations, control over State property, treaty communications, representation before international organisations, and ordinary government-to-government dealings.

De facto recognition is narrower. It accepts that an authority exercises practical control, but it withholds full legal approval. This form is useful where a foreign State needs to deal with an authority for limited purposes while refusing to endorse the legality of its position.

Klabbers gives the British treatment of Nazi authority in Czechoslovakia as an example of de facto recognition used for practical dealings while withholding full approval (Klabbers, 2024). The point is not that de facto recognition validates the underlying situation. Its function is limited: it acknowledges that an authority exists and must sometimes be dealt with.

The distinction has practical consequences. De jure recognition may affect asset control, litigation standing, diplomatic status, and treaty relations. De facto recognition may justify limited dealings but leave larger questions unsettled. Courts and governments often examine the wording of executive statements carefully because small differences in recognition language can determine large legal outcomes.

3.5 Governments in exile

Governments in exile show why effective control cannot be the only criterion. Where a State is unlawfully occupied or annexed, the displaced government may continue to be treated as the lawful representative even without territorial control.

The Baltic States are the strongest example. Estonia, Latvia, and Lithuania were incorporated into the Soviet Union, but many States refused to recognise the legality of that incorporation. Their pre-war statehood was treated as continuing, and diplomatic representatives were in some cases allowed to maintain legal functions abroad (Crawford, 2006; Aust, 2005).

This practice protects the rule that unlawful occupation cannot extinguish statehood. If effective control were decisive in every case, annexation would become legally easier. A foreign power could suppress local institutions, install its own administration, and then rely on control as proof of legality.

Governments in exile do not solve every case. Their authority depends on continuity, international acceptance, constitutional legitimacy, and the illegality of the displacement. They are strongest where occupation or annexation violates fundamental rules and where the displaced authority preserves a credible claim to represent the State.

3.6 Credentials at the UN

Credentials disputes at the United Nations often operate as practical recognition disputes. They do not formally decide statehood, but they decide who sits in the chair, speaks in debates, votes, signs documents, and receives institutional communications.

The legal basis is procedural, but the consequences are substantive. If the General Assembly accepts one delegation’s credentials, that delegation gains the ability to act for the State within the organisation. If credentials are rejected or deferred, the contested authority may be blocked even if it controls territory.

Credentials questions are especially important where rival authorities claim to represent the same State. The issue is not the birth of a new State. It is a representation of which authority may exercise the existing State’s institutional rights.

This is why UN practice must be read carefully. Admission under Article 4 of the UN Charter concerns membership of a State. Credentials concern the representation of a member already inside the organisation. Confusing the two leads to poor legal analysis.

Recognition of governments is best understood as a discipline of representation. It asks who can legally act for a continuing State when political authority is contested. The answer may depend on control, constitutional legitimacy, non-recognition of illegality, institutional practice, and the need to protect ordinary international dealings.

4. Non-Recognition And Illegality

4.1 The duty not to recognise

Non-recognition is the negative side of State Recognition. It does not merely mean that a State refuses diplomatic relations. It means that international law may require States not to treat a situation as legally valid when that situation was created by a serious breach of fundamental rules.

The strongest basis is Article 41 of the International Law Commission’s Articles on State Responsibility. It provides that no State shall recognise as lawful a situation created by a serious breach of an obligation arising under a peremptory norm, and no State shall render aid or assistance in maintaining that situation (International Law Commission, 2001, art. 41). The rule is aimed at illegal facts that claim legal consequences.

This duty matters most where territorial control has been obtained through aggression, unlawful annexation, racial domination, colonial subjugation, or denial of self-determination. In those cases, recognition would not be neutral. It would help convert illegality into an apparent legal title.

Non-recognition protects the integrity of the legal order. It tells States that some situations cannot be validated by diplomatic convenience, treaty practice, silence, maps, investment activity, or administrative dealings.

4.2 Territorial acquisition by force

The prohibition on the threat or use of force is central to modern international law. Article 2(4) of the United Nations Charter requires States to refrain from the threat or use of force against the territorial integrity or political independence of any State (UN Charter, 1945, art. 2(4)).

This rule has a direct effect on recognition. If territory is acquired through force, other States cannot treat the acquisition as a lawful title. Recognition of annexation would undermine the Charter system by rewarding the very conduct it prohibits.

The Friendly Relations Declaration confirms the same principle: no territorial acquisition resulting from the threat or use of force shall be recognised as legal (UN General Assembly, 1970). This rule is not a technical detail. It is one of the main legal barriers against conquest.

Ordinary recognition practice cannot operate where force has produced the territorial claim. Diplomatic recognition, treaty references, administrative cooperation, or economic dealings must not be used to imply acceptance of unlawful sovereignty.

4.3 The Namibia principle

The ICJ’s Namibia Advisory Opinion gives the leading explanation of how non-recognition works in practice. The Court held that South Africa’s continued presence in Namibia was unlawful and that States had a duty not to recognise the legality of that presence (ICJ, 1971).

The opinion also introduced an important limitation. Non-recognition must not harm the population by invalidating ordinary civil acts. Acts such as birth registration, death registration, marriage, and other private-law matters may need to be accepted because refusing to recognise them would damage the rights and daily lives of individuals (ICJ, 1971).

This is the core of the Namibia principle. International law denies legal validity to the unlawful authority, but it does not erase the people living under that authority. The target is the illegal situation, not the civil existence of the population.

The principle prevents two errors. The first is legal normalisation of unlawful control. The second is excessive rigidity that punishes individuals for living under an illegal regime.

4.4 Crimea and occupied territories

Crimea is a modern example of non-recognition of annexation. Russia’s claim to Crimea has been widely rejected because it is linked to the use of force against Ukraine’s territorial integrity. The General Assembly affirmed Ukraine’s territorial integrity in Resolution 68/262 and later rejected attempts to alter Ukraine’s internationally recognised borders through annexation claims and referendums conducted under coercive conditions (UN General Assembly, 2014; UN General Assembly, 2022).

The legal consequence is not limited to diplomatic language. Non-recognition affects sanctions, asset control, investment risk, treaty application, official maps, consular practice, and public dealings with authorities operating in the territory. States must avoid acts that imply acceptance of the annexation.

An occupation cannot mature into sovereignty merely because time passes. Control may create factual administration, but it does not create legal title where the original control violates the Charter. That distinction is essential: occupation may generate duties under international humanitarian law, but it does not transfer sovereignty.

The occupied Palestinian territory raises the same structural issue. In the Wall Advisory Opinion, the ICJ stressed the duties of non-recognition and non-assistance connected to serious breaches affecting self-determination and territorial status (ICJ, 2004). In its 2024 Advisory Opinion on Israeli policies and practices in the Occupied Palestinian Territory, the Court again treated non-recognition and non-assistance as legal consequences flowing from unlawful territorial situations (ICJ, 2024).

4.5 Non-recognition and human rights

Non-recognition cannot become an excuse to abandon people living under unlawful authority. A population under occupation, annexation, or contested administration still has rights. Those rights may arise under human rights law, international humanitarian law, refugee law, nationality law, or ordinary private law.

This creates a difficult balance. States must not recognise the unlawful situation as legally valid, but they may still need to engage for limited humanitarian or protective purposes. Medical cooperation, evacuation, consular access, family registration, humanitarian relief, prisoner exchanges, and civil documentation may be necessary without implying recognition.

Courts and governments should ask a precise question: Does the act help validate or maintain the unlawful situation, or does it protect individuals from harm? The first is prohibited. The second may be required.

Non-recognition is strongest when it denies legal benefit to illegality and weakest when it becomes formalism detached from human consequences. Its proper function is to defend territorial integrity, self-determination, and peremptory rules while preserving the civil and human rights of affected persons.

5. Self-Determination And Secession

5.1 Self-determination as a legal principle

Self-determination is not a loose political slogan. It is a legal principle recognised in the United Nations Charter, common Article 1 of the ICCPR and ICESCR, the Friendly Relations Declaration, and the decolonisation practice of the United Nations (UN Charter, 1945, art. 1(2); ICCPR, 1966, art. 1; ICESCR, 1966, art. 1; UN General Assembly, 1970).

Its basic claim is that people have a right to determine their political status and pursue their economic, social, and cultural development. The hard question is not the existence of the principle, but its legal consequences in different contexts. Self-determination has a clear role in colonial independence. It also matters in foreign occupation, racial domination, indigenous rights, minority protection, autonomy arrangements, and secession debates (Cassese, 1995; Crawford, 2006).

For State Recognition, self-determination is central because it can strengthen or weaken a claim to statehood. A claim emerging from decolonisation or unlawful foreign occupation has a different legal quality from a claim made by a regional group inside a functioning State. The principle does not automatically convert every person into a separate State.

The International Court of Justice treated self-determination as a right opposable to all States in the East Timor case and later connected it to the legal status of the occupied Palestinian territory (ICJ, 1995; ICJ, 2004; ICJ, 2024). That does not make secession automatic. It means that territorial status cannot be assessed without asking whose political will international law is protecting.

5.2 Internal self-determination

Internal self-determination is the ordinary legal pathway. It concerns participation within an existing State rather than separation from it. It includes political representation, democratic participation, local autonomy, language rights, cultural protection, religious freedom, access to public institutions, and protection against systematic exclusion.

This form is especially important for minorities and indigenous peoples. International law does not treat every minority as entitled to independent statehood. The stronger legal demand is usually meaningful participation, equality, non-discrimination, cultural survival, and some level of self-government where appropriate (Thornberry, 1991; UN General Assembly, 2007).

Internal self-determination also protects the territorial integrity of existing States. The Friendly Relations Declaration links self-determination with the condition that States conduct themselves in compliance with equal rights and representative government (UN General Assembly, 1970). That connection matters. A State that genuinely represents its whole population has a stronger claim against unilateral separation.

This is why many secession claims fail at the legal level. Dissatisfaction with the central government, economic grievance, cultural difference, or regional identity is not enough by itself. International law normally expects those claims to be addressed through internal political arrangements before external separation is considered.

5.3 External self-determination

External self-determination concerns the choice of international status. It may lead to independence, association with another State, integration into another State, or another freely chosen political arrangement. It is strongest in three situations: colonial rule, foreign occupation, and regimes that deny a people any meaningful internal political existence.

Decolonisation is the clearest case. The colonial territory was not treated as merely part of the metropolitan State. The people of the territory had a right to decide their status. The UN decolonisation framework turned self-determination into a legal basis for independence, not just a political aspiration (UN General Assembly, 1960; ICJ, 1975).

Foreign occupation also strengthens external self-determination. In such cases, territorial control by the occupying power cannot extinguish the political rights of the people concerned. East Timor and Palestine show that self-determination can survive long periods of external control and remain legally relevant even when effective authority lies elsewhere (ICJ, 1995; ICJ, 2004; ICJ, 2024).

The difficult category is severe internal oppression. Some scholars argue that a people may acquire a right to external self-determination where internal self-determination is permanently denied, and the group faces grave persecution. This is often called remedial succession. It remains controversial. It has support in academic writing and some judicial dicta, but it has not crystallised into a clear general rule (Buchanan, 2004; Crawford, 2006; Vidmar, 2013).

5.4 Secession by consent

Secession by consent is legally different from unilateral separation. If the parent State agrees to the process, or if separation follows an accepted constitutional framework, the main legal objections are reduced. The issue becomes one of negotiated state creation, not defiance of territorial integrity.

South Sudan is the leading modern example. Its independence followed a peace agreement, a referendum, and international acceptance. The process did not remove all later disputes, especially over borders, oil, nationality, and security, but the consensual framework made recognition far less legally controversial.

Eritrea also illustrates the importance of consent and international supervision. Its independence followed the collapse of Ethiopian control, a referendum, and acceptance by Ethiopia. The result was treated as state creation through an agreed political and legal process rather than ordinary unilateral secession.

Czechoslovakia provides a different model. Its dissolution into the Czech Republic and Slovakia was peaceful and negotiated. The legal problems were real: nationality, assets, debts, treaties, and membership in international organisations all required settlement. Yet the absence of a contested unilateral break made the recognition and succession issues more manageable.

Consent does not make every consequence automatic. It reduces the core sovereignty objection. Succession questions still remain, but they are usually handled through agreement rather than litigation or non-recognition.

5.5 Unilateral secession

Unilateral secession is the hardest case. Outside decolonisation, foreign occupation, or possibly extreme oppression, international law does not generally grant groups a right to separate from an existing State without that State’s consent (Crawford, 2006; Shaw, 2021).

The Supreme Court of Canada’s Quebec Reference is useful because it separates political claims from legal entitlement. The Court held that Quebec had no unilateral right to secede under Canadian or international law, but a clear democratic vote for secession would create a political obligation to negotiate under Canadian constitutional principles (Supreme Court of Canada, 1998). The decision is not binding as international law for all States, but its reasoning is influential.

The main reason for caution is territorial stability. If international law recognised a broad unilateral right of secession, many States with regional, ethnic, linguistic, or religious divisions would face constant fragmentation claims. That would weaken territorial integrity and may increase conflict.

At the same time, international law cannot ignore serious oppression. The strongest remedial secession argument arises where a people is systematically denied internal self-determination, subjected to severe abuses, and left without any realistic internal remedy. Even there, the law is unsettled. Recognition practice remains selective and heavily influenced by facts, regional politics, Security Council positions, and concerns about precedent.

A careful article should not present remedial secession as settled law. It is better analysed as an exceptional argument that may influence recognition practice in extreme cases, rather than as a general entitlement to independent statehood.

5.6 Kosovo’s limited legal holding

Kosovo is often misused in legal and political arguments. The ICJ did not decide that Kosovo had a right to secede. It did not decide that Kosovo was a State for all purposes. It did not require other States to recognise Kosovo. Its holding was narrower: Kosovo’s declaration of independence did not violate general international law, Security Council Resolution 1244, or the applicable constitutional framework in the way argued before the Court (ICJ, 2010).

That distinction is essential. A declaration of independence may be legally permitted without producing statehood. Statehood still requires a separate analysis of territory, population, government, independence, legality, recognition, and institutional practice.

Kosovo also shows how State Recognition operates after a contested secession. Many States recognised Kosovo. Others refused, often citing territorial integrity, Security Council practice, and concern about separatist precedent. The result is partial recognition, significant international engagement, and continuing limits on universal institutional participation.

The Kosovo opinion should be read as a decision about the legality of a declaration, not as a general doctrine of secession. Its importance lies in narrowing what international law prohibits. It does not create a simple route to statehood for every separatist movement.

Self-determination and secession must be analysed with that discipline. The legal sequence matters: identify the people, assess internal self-determination, examine colonial or occupation context, test the legality of separation, then consider recognition. Skipping those steps turns law into political preference.

6. Continuity, Identity, And Extinction

6.1 Why continuity controls the whole article

Continuity is the control point between State Recognition and succession. Without it, the analysis becomes confused. If the same State continues, the issue is not succession in the strict sense. The State keeps its treaties, debts, rights, claims, immunities, international memberships, and responsibility unless a specific rule or agreement changes that position. If one State is replaced by another in responsibility for the international relations of a territory, succession questions begin (Craven, 1998; Crawford, 2006).

This is why continuity must be analysed before succession. A change of government is not the same as a change of State. A change of borders is not always extinction. Even radical constitutional collapse does not automatically destroy international personality. International law is conservative here because legal identity stabilises relations with other States, creditors, individuals, courts, and international organisations.

The recent Routledge treatment of public international law correctly separates succession from continuity and identity. Succession concerns replacement. Continuity concerns persistence. Where identity continues, legal entitlements and obligations are presumed to endure. That presumption explains why States are not allowed to escape obligations merely by changing regimes, rewriting constitutions, or losing part of their territory (González Hauck, Kunz and Milas, 2024).

Continuity also affects recognition. Recognition of a new State may be necessary where identity has broken. Recognition of a government may be enough where the State continues, but representation is contested. The error is to treat every political rupture as the birth of a new State.

6.2 Changes that do not end the State

Most internal changes do not terminate statehood. Revolutions, coups, elections, civil wars, constitutional amendments, authoritarian takeovers, temporary occupation, and government collapse may create serious legal problems, but they do not ordinarily extinguish the State.

This rule protects legal stability. If a coup ended the State, every treaty would become uncertain. If civil war destroyed international personality, foreign assets, diplomatic relations, debts, nationality, and responsibility would fall into legal disorder. International law avoids that result by separating the State from its government (Aust, 2005; Crawford, 2006).

A State can also survive a severe loss of effectiveness. Governments may lose control over territory during armed conflict. Institutions may stop functioning. Foreign forces may occupy the capital. None of this necessarily ends the State. The legal person may continue even when its government is displaced or weakened.

Occupation gives the clearest example. The occupying power may exercise factual authority, but sovereignty does not pass to it. The occupied State remains the legal sovereign. This is why occupation creates duties under international humanitarian law without producing a lawful territorial title (Hague Regulations, 1907; Geneva Convention IV, 1949).

Territorial loss is also not fatal by itself. A State may lose provinces, colonies, islands, or border areas and still continue. The real question is whether the original legal person remains identifiable after the change. If it does, continuity prevails. If the prior State dissolves and no entity can plausibly claim its identity, succession rules allocate the consequences.

6.3 Russia and the USSR

The Russian Federation’s claim to continue the international legal personality of the Soviet Union is the leading modern example of accepted continuity after imperial-scale collapse. After the dissolution of the USSR, Russia was treated as continuing the USSR’s seat in the United Nations, including the permanent seat on the Security Council. The other former Soviet republics were treated as new or restored States for most institutional purposes.

This was not a neutral technical outcome. It was a political and legal settlement designed to avoid institutional crisis, especially inside the Security Council and in relation to nuclear weapons, treaty obligations, diplomatic property, and external debt. Klabbers notes that Russia’s continuation was accepted as a special solution rather than as a simple application of an obvious rule (Klabbers, 2024).

The Russian case shows that continuity can depend on acceptance by other States and international organisations. Russia’s claim worked because it was not effectively resisted by the relevant actors at the decisive moment. Its size, population, capital, military capacity, nuclear status, administrative continuity, and political agreement among former Soviet republics all supported the claim.

Yet the case should not be turned into a universal formula. Russia did not continue the USSR because the largest successor always continues the predecessor. It continued because State practice accepted that result in a specific geopolitical context. That distinction matters.

6.4 Yugoslavia and rejected continuity

The former Yugoslavia proves the opposite point. Serbia and Montenegro, acting as the Federal Republic of Yugoslavia, claimed to continue the international legal personality of the Socialist Federal Republic of Yugoslavia. That claim was rejected by the Security Council and the General Assembly. The Federal Republic of Yugoslavia was not allowed simply to occupy the former Yugoslavia’s UN seat as the continuing State (UN Security Council, 1992; UN General Assembly, 1992).

This rejection is doctrinally important. It proves that continuity is not self-judging. A State cannot merely announce that it is the predecessor State and expect the claim to control the legal position of others. Other States, courts, depositaries, and international organisations may accept or reject the continuity claim.

The Badinter Commission treated the Socialist Federal Republic of Yugoslavia as being in dissolution, not as a State continued by Serbia and Montenegro alone (Badinter Commission, 1991–1992). That conclusion affected recognition, UN participation, treaty relations, assets, debts, archives, and succession negotiations.

The contrast with Russia is sharp. Russia was accepted as the continuator of the USSR. The Federal Republic of Yugoslavia was treated as one of several successor States. The difference did not come from one mechanical rule. It came from facts, political acceptance, institutional practice, and the legal assessment of dissolution.

This comparison is useful for the whole article. It shows that State Recognition and continuity interact. Recognition of statehood is not the same as acceptance of continuity. A State may be recognised as a State while denied the right to inherit the predecessor’s institutional seat, treaty position, or assets as sole continuator.

6.5 The Baltic States

Estonia, Latvia, and Lithuania present a different model: restored continuity after illegal annexation. Their legal claim was not ordinary succession from the Soviet Union. It was that their pre-war statehood had continued despite Soviet incorporation.

Many Western States refused to recognise the legality of the Soviet annexation of the Baltic States. That non-recognition preserved the legal argument that Baltic statehood was interrupted in fact but not extinguished in law. Diplomatic missions and consular elements continued in some jurisdictions, reinforcing the idea of legal continuity (Crawford, 2006; Aust, 2005).

This example is important because it links continuity to illegality. If unlawful annexation could extinguish the victim State simply through effective control, the prohibition of force would lose much of its value. International law resists that outcome by refusing to let illegal territorial control mature into lawful extinction.

The Baltic case also shows why non-recognition is not empty rhetoric. It preserved claims to statehood, property, diplomatic identity, and historical legal personality. When the Baltic States regained effective independence, they did not present themselves simply as new States created after the Soviet collapse. Their claim was the restoration of States that had continued legally through occupation.

That reasoning cannot be used casually. Restored continuity requires a strong legal basis: prior statehood, unlawful loss of control, sustained non-recognition of annexation, and later re-establishment of effective independence. The Baltic States had that combination. Many contested entities do not.

6.6 Climate-threatened States

Climate-threatened States raise a newer and harder problem. Small island States may face loss of habitable territory, displacement of population, destruction of infrastructure, and long-term inability to exercise normal governmental functions. The traditional criteria of statehood were not designed for a world in which environmental change could physically undermine territory.

A strict territorial approach would create severe injustice. If a people loses territory because of sea-level rise caused largely by global emissions, extinguishing its State would punish the victim. It would also create major legal uncertainty over nationality, maritime zones, treaty rights, public property, debt, cultural heritage, and membership in international organisations.

For that reason, recent legal work has moved toward preserving continuity. The International Law Commission’s study on sea-level rise has treated statehood, maritime entitlements, and protection of affected persons as linked problems requiring stability rather than automatic extinction (International Law Commission, 2020; International Law Commission, 2023). Pacific practice also supports the idea that climate-threatened States should retain legal personality and maritime entitlements despite physical change (Pacific Islands Forum, 2021).

This is not a completely settled rule. International law has not yet adopted a comprehensive convention on climate-threatened statehood. Still, the better legal position is that continuity should be presumed where an existing State faces climate-driven loss of habitability or territory. Extinction should not be inferred lightly.

The logic is consistent with the rest of the doctrine. International law already allows States to survive occupation, government collapse, territorial loss, and forced displacement. Climate change should not be treated more harshly than war or annexation. The central function of continuity is to protect legal personality when factual conditions become unstable.

Climate-threatened States also show why the older Montevideo framework needs careful application. The permanent population may become dispersed. Defined territory may become submerged or uninhabitable. Government may operate remotely. Capacity for international relations may continue through diplomatic missions, treaty participation, digital administration, and institutional membership. The law should ask how personality can be preserved, not how quickly it can be denied.

The point is not sentimental. It is legal. Continuity protects people's rights, obligations, and institutional stability. If international law can preserve the identity of States during occupation and dissolution crises, it has strong reasons to preserve the personality of States facing existential climate harm.

7. The Structure Of State Succession

7.1 The definition of succession

State succession is usually defined through the Vienna formula: “the replacement of one State by another in the responsibility for the international relations of territory” (Vienna Convention on Succession of States in Respect of Treaties, 1978, art. 2(1)(b)). The same formulation appears in the 1983 Vienna Convention on State Property, Archives and Debts and in the International Law Commission’s work on succession (Vienna Convention on Succession of States in Respect of State Property, Archives and Debts, 1983, art. 2(1)(a); International Law Commission, 1981).

The definition is careful. It does not say that the successor State inherits everything. It only identifies the factual-legal event that triggers the inquiry: one State has replaced another in responsibility for the international relations of a territory. What follows depends on the type of succession, the subject matter, the applicable treaty, customary law, institutional practice, and any agreement between the States concerned.

This is why succession must not be confused with inheritance in private law. A successor State does not simply step into all legal positions of the predecessor. Boundary obligations, human rights duties, public debts, archives, State property, nationality, and treaty relations may follow different rules. The word “succession” can mislead if it suggests automatic transfer (Craven, 1998; Crawford, 2006).

The concept also differs from State Recognition. Recognition concerns acceptance of legal status or representation. Succession concerns the legal consequences of a territorial replacement. The two may interact, but they answer different questions.

7.2 Succession as a legal consequence

State succession is not the political event itself. Independence, separation, dissolution, merger, absorption, transfer of territory, and restoration of sovereignty are political and legal events. Succession is the body of rules that determines what happens after those events alter responsibility for territory.

The consequences can be extensive. Treaties may continue, lapse, or require confirmation. Public property may pass to the successor State if it is connected with the territory. Archives may need to be transferred, copied, or shared. Debts may be apportioned. Nationality rules may need to prevent statelessness. Membership in international organisations may require admission, continuation, or institutional decision (Aust, 2005; Crawford, 2006).

The legal consequences rarely arise in isolation. A territorial separation may raise treaty succession, debt division, pension rights, archives, diplomatic property, military assets, pending litigation, and citizenship questions at the same time. The former Yugoslavia and the former Soviet Union show how wide the field can become once the predecessor State dissolves or loses control over multiple territories.

A serious analysis must ask the right sequence of questions. Has the predecessor State continued or disappeared? Is the new entity a successor State, a restored State, or a continuator State? Is the affected matter a treaty, debt, archive, public asset, nationality issue, or institutional membership? Different answers produce different legal consequences.

7.3 Lawful succession only

The codified rules on succession generally assume that the succession occurs in conformity with international law. Article 6 of the 1978 Vienna Convention and Article 3 of the 1983 Vienna Convention limit their application to successions consistent with international law and the principles of the United Nations Charter (Vienna Convention on Succession of States in Respect of Treaties, 1978, art. 6; Vienna Convention on Succession of States in Respect of State Property, Archives and Debts, 1983, art. 3).

This limitation is essential. It prevents the law of succession from being used to normalise unlawful annexation, aggression, or imposed territorial change. If a State occupies and annexes territory by force, that situation cannot be treated as an ordinary succession that transfers lawful title, treaties, assets, or institutional rights.

The distinction matters in occupied territories. Occupation may create factual administration and duties under international humanitarian law, but it does not transfer sovereignty. The occupying power may be responsible for public order, civil life, and protection of persons, yet it does not become the lawful successor State.

This rule connects succession with non-recognition. If a territorial situation is unlawful, other States must avoid conduct that implies acceptance of the new claim of sovereignty. Succession law cannot cure illegality. It operates only where the underlying territorial change is legally capable of producing consequences.

7.4 Types of succession

State succession appears in several forms. Each form has a different legal profile.

Decolonisation is the clearest historical category. A dependent territory becomes independent and assumes responsibility for its international relations. The clean slate approach for treaties was developed mainly to protect newly independent States from automatic continuation of colonial treaty burdens (Vienna Convention on Succession of States in Respect of Treaties, 1978, art. 16).

Transfer of territory occurs where part of one State’s territory becomes part of another State. The usual problem is not the birth of a new State, but the change in the territorial application of treaties, laws, public assets, and administrative obligations. The “moving treaty frontiers” principle often becomes relevant.

Separation or secession arises where part of an existing State breaks away and forms a new State, while the predecessor continues. This category produces difficult issues because the parent State remains, but the new State must establish its own treaty position, nationality regime, public institutions, and external relations.

Dissolution occurs where the predecessor State disappears, and two or more successor States emerge. Czechoslovakia and the Socialist Federal Republic of Yugoslavia are central examples. Dissolution requires allocation of assets, debts, archives, treaty positions, international claims, and institutional participation. No single successor can automatically claim the whole predecessor personality unless that claim is accepted as continuity.

Merger or absorption involves one State joining another or two States forming a new entity. German reunification is usually treated as the absorption of the German Democratic Republic into the Federal Republic of Germany, not the creation of an entirely new German State. That classification affected treaty continuity, international organisation membership, and legal identity (Klabbers, 2024).

These categories are analytical tools, not rigid boxes. Real cases often combine elements of more than one form. The legal classification still matters because it shapes the consequences.

7.5 Agreement as the practical engine

Agreement is the practical engine of succession. Codified rules provide structure, but many major issues are settled by negotiation. This is especially true for assets, debts, archives, military property, embassies, central bank reserves, pensions, nationality, institutional participation, and pending claims.

The reason is simple: succession problems are too fact-specific for one automatic rule. A debt may have financed infrastructure in one territory, benefited the whole predecessor State, or served military operations unrelated to the successor. Archives may be physically located in one capital but legally relevant to several successor States. Diplomatic property abroad may have symbolic and financial value. Military assets may raise security risks.

Agreements can divide property, allocate debt percentages, regulate access to archives, settle nationality options, preserve acquired rights, and confirm treaty continuity. The 2001 Agreement on Succession Issues among the former Yugoslav republics illustrates this approach. It dealt with diplomatic and consular properties, financial assets and liabilities, archives, pensions, and other acquired rights through negotiated arrangements rather than abstract formulas.

This does not mean the law disappears. Legal principles frame the negotiation. Equity, territorial connection, acquired rights, prevention of statelessness, non-recognition of illegality, and good faith all influence the settlement. But the final allocation often depends on a detailed agreement.

State succession is best understood as a structured legal process, not automatic inheritance. It begins with territorial replacement, but its consequences must be worked out issue by issue. That is why continuity, recognition, legality, and agreement remain central to the whole doctrine.

8. Succession To Treaties

8.1 The role of the 1978 Convention

The Vienna Convention on Succession of States in Respect of Treaties is the main codified instrument on treaty succession. It entered into force on 6 November 1996 and, according to the United Nations Treaty Collection, has 23 parties as of 14 May 2026 (United Nations Treaty Collection, 2026).

Its importance should not be overstated. The Convention governs relations among its parties and influences legal reasoning more broadly, but it is not a complete restatement of universal customary law. Many major States are not parties. Several provisions reflect decolonisation policy, compromise, or contested assumptions rather than settled global practice.

The Convention is still essential because it gives structure to a difficult field. It separates newly independent States, the transfer of territory, separation, dissolution, and uniting of States. It also preserves the special position of boundary treaties and other territorial regimes. The key mistake is to treat the Convention as automatic machinery. It is a legal framework, not a substitute for factual and doctrinal analysis.

Treaty succession must also be read with the Vienna Convention on the Law of Treaties. Pacta sunt servanda, treaty interpretation, territorial application, third-State consent, and object and purpose all remain relevant (Vienna Convention on the Law of Treaties, 1969, arts. 26, 29, 31–32).

8.2 The clean slate rule

The clean slate rule protects newly independent States. Article 16 of the 1978 Convention provides that a newly independent State is not bound to maintain in force, or become party to, a treaty merely because the treaty applied to its territory before independence (Vienna Convention on Succession of States in Respect of Treaties, 1978, art. 16).

The rule was shaped by decolonisation. Former colonies should not inherit treaty burdens imposed by colonial powers without consent. Independence would be incomplete if the new State were automatically locked into external obligations negotiated by another sovereign.

The clean slate principle does not mean legal isolation. A newly independent State may choose to continue treaties, notify succession to multilateral treaties, or negotiate new bilateral arrangements. Many did so for practical reasons: trade, aviation, postal services, consular relations, investment, borders, and technical cooperation could not simply stop.

The rule is strictest for colonial independence. It should not be casually extended to every secession or dissolution. The Convention itself treats newly independent States differently from cases where part of an existing State separates outside the colonial context. That distinction is controversial but central to the treaty’s architecture (Dumberry, 2015).

8.3 Moving treaty frontiers

The moving treaty frontiers rule applies where territory passes from one State to another. The predecessor’s treaties normally cease to apply to the transferred territory, and the successor’s treaties begin to apply there. Article 15 of the 1978 Convention reflects this approach (Vienna Convention on Succession of States in Respect of Treaties, 1978, art. 15).

The rule is practical. Treaties usually bind States territorially. If a province, island, or border area becomes part of another State, the treaty regime of the new sovereign will ordinarily extend to that territory. The old sovereign’s treaty obligations no longer govern it unless the parties agree otherwise.

This principle is not absolute. Some treaties are tied to a specific territory or local regime. Others may require the consent of third parties. Human rights, environmental, navigation, watercourse, demilitarisation, and boundary arrangements may raise special questions. The legal analysis must examine the treaty’s subject, territorial connection, parties, and object.

The rule also cannot validate illegal annexation. A lawful transfer of territory may trigger moving treaty frontiers. Occupation or annexation by force does not.

8.4 Boundary and territorial treaties

Boundary treaties normally continue despite succession. This is one of the most stable principles in the field. If every new State could reopen inherited borders, dissolution and decolonisation would generate permanent territorial conflict.

The 1978 Convention protects this stability. Article 11 states that succession does not affect a boundary established by a treaty or obligations and rights established by a treaty relating to the regime of a boundary (Vienna Convention on Succession of States in Respect of Treaties, 1978, art. 11). Article 12 deals with other territorial regimes and also resists automatic disruption.

The legal logic is straightforward. Boundary treaties are not ordinary exchanges of performance. They create an objective territorial settlement. Once a boundary is established, it is meant to survive changes in government, constitutional structure, and even succession.

This connects treaty succession with uti possidetis juris. In decolonisation and dissolution contexts, inherited administrative boundaries often become international boundaries to preserve stability and prevent conflict (Frontier Dispute, 1986). The rule may produce imperfect borders, but the alternative is often worse: renewed territorial contestation.

8.5 Human rights treaties

Human rights treaties raise a different problem. If treaty succession is treated as a clean break, individuals may lose legal protection overnight because sovereignty has changed. That result is hard to reconcile with the object and purpose of human rights law.

The stronger argument favours continuity or at least presumptive continuity. Human rights obligations protect persons under jurisdiction. They are not merely reciprocal bargains among States. When territorial responsibility changes, the need for protection remains. The individual should not pay the legal price for dissolution, separation, or independence (Klabbers, 2024; Human Rights Committee, 1997).

This does not mean every procedural detail continues without action. Reporting obligations, optional protocols, reservations, declarations, and complaint mechanisms may require formal confirmation. But the core protective logic points against a gap in rights.

The Human Rights Committee has taken a strong position that rights under the ICCPR belong to the people living in the territory and that once protection has been granted, it should not be removed merely by succession (Human Rights Committee, 1997). That view is influential because it treats succession as a problem of human protection, not only State consent.

The point should be stated sharply: succession should not become a device for suspending human rights.

8.6 Disarmament and security treaties

Disarmament and security treaties raise systemic concerns. Nuclear non-proliferation, arms control, neutrality, demilitarisation, and territorial security arrangements are not ordinary bilateral bargains. Their interruption may affect regional or global stability.

The dissolution of the Soviet Union shows the issue clearly. Nuclear weapons, arms control commitments, and non-proliferation duties could not be left to ordinary clean slate logic. The legal and political settlement required continuity, accession, removal of weapons, and security assurances through coordinated arrangements (Aust, 2005; Bunn and Rhinelander, 1993).

Automatic escape from security treaties would be dangerous. A successor State could claim freedom from arms limits, inspection duties, demilitarised zones, or non-proliferation commitments. That would create incentives to use succession as a route around collective security obligations.

The better approach is contextual. Treaties linked to international peace and security require close attention to object and purpose, third-party reliance, Security Council practice, and regional stability. Consent remains important, but legal continuity may carry stronger weight where abrupt termination would create a serious risk.

8.7 Bilateral treaties

Bilateral treaties are often harder than multilateral treaties. Their continuation depends on the treaty’s subject, the intention of the parties, the type of succession, territorial connection, and the need for reciprocal consent.

Some bilateral treaties are naturally territorial. Boundary agreements, watercourse treaties, servitudes, transit rights, and local infrastructure arrangements may continue because they are tied to land or a territorial regime. Others are personal to the predecessor State, such as political alliances, defence cooperation, extradition arrangements, trade privileges, or cultural agreements.

In practice, successor States often confirm, renegotiate, replace, or terminate bilateral treaties. Exchange of notes is common. This gives legal certainty to both sides and avoids disputes over implied continuity.

Changed circumstances may also matter, but it should not be used carelessly. Succession itself does not automatically terminate every bilateral treaty. The proper question is whether continued application is compatible with the treaty’s object, the identity of the parties, and the new territorial or political situation.

Bilateral treaty succession exposes the weakness of automatic rules. Consent, reliance, territorial link, and practical administration all matter.

8.8 Treaties of international organisations

Constituent instruments of international organisations require separate analysis. Membership in an organisation is usually governed by the organisation’s own charter, not by general treaty succession alone.

A new State may need to apply for membership even if the predecessor was a member. That is especially true after dissolution or separation. The United Nations Charter, for example, controls admission through Article 4, requiring a decision of the General Assembly on the recommendation of the Security Council (UN Charter, 1945, art. 4).

Continuator States are different. If an entity is accepted as continuing the predecessor’s legal personality, it may remain in the organisation without new admission. Russia’s continuation of the Soviet Union’s UN seat is the strongest modern example. By contrast, the Federal Republic of Yugoslavia’s claim to continue the Socialist Federal Republic of Yugoslavia was rejected (UN Security Council, 1992; UN General Assembly, 1992).

This distinction matters for State Recognition. Recognition as a State does not automatically confer membership in every organisation. Institutional admission, credentials, treaty succession, and continuity must be kept separate.

Treaty succession in organisations is ultimately institutional. The organisation’s rules, organs, practice, and political decisions shape the legal result. General succession law supplies background principles, but it does not override the constituent instrument.

9. Property, Archives, And Debts

9.1 The 1983 Convention’s weak status

The Vienna Convention on Succession of States in Respect of State Property, Archives and Debts is important, but its legal force is limited. It has not entered into force and, as recorded by the United Nations Treaty Collection, it has only seven parties and seven signatories (United Nations Treaty Collection, 2026). Its value is mainly doctrinal and evidential.

The Convention still matters because it reflects the International Law Commission’s attempt to organise a difficult field: what happens to public assets, official records, and State liabilities when territorial responsibility changes. Yet it cannot be treated as a complete statement of customary law. State practice remains uneven, and many disputes are resolved through negotiated settlements rather than direct application of codified rules (International Law Commission, 1981; Dumberry, 2007).

9.2 Immovable State property

The usual rule is that immovable State property located in the territory affected by succession passes to the successor State. This covers land, public buildings, administrative offices, military installations, infrastructure, and other assets owned by the predecessor State in that territory.

The logic is functional. The successor State cannot govern the territory properly if the predecessor retains the public property needed for administration. Courts, ministries, police buildings, land registries, ports, roads, and public utilities are not ordinary commercial assets. They are part of the machinery of territorial government.

The 1983 Convention reflects this approach for transfers of territory and newly independent States (Vienna Convention on Succession of States in Respect of State Property, Archives and Debts, 1983, arts. 14–15). The rule is strictest where the property is physically located in the successor territory and directly connected to public functions there.

9.3 Movable State property

Movable property is harder. It may include vehicles, military equipment, ships, aircraft, furniture, documents, gold reserves, bank accounts, cultural objects, technical equipment, or administrative materials.

The better test is functional connection. Movable property linked to the predecessor’s activity in the territory should normally pass to the successor. For example, vehicles used by local public agencies, equipment used in regional administration, or records necessary for territorial governance have a stronger claim to transfer.

Assets abroad are more controversial. Embassies, central bank accounts, military property, and diplomatic residences may represent the whole predecessor State rather than one territory. In dissolution cases, they often require apportionment by agreement. The former Yugoslavia shows how diplomatic and financial assets abroad can become some of the most contested parts of succession (Craven, 1998; Dumberry, 2007).

9.4 Archives as legal infrastructure

Archives are not merely historical material. They are a legal infrastructure. They prove nationality, land title, tax liability, public employment, pensions, military service, court judgments, treaty implementation, borders, administrative decisions, and human rights violations.

Without archives, a successor State may struggle to govern lawfully. People may be unable to prove citizenship, ownership, family status, public service, or entitlement to benefits. Boundary disputes may become harder to resolve. Victims of past abuses may lose evidence.

The 1983 Convention treats archives separately because they serve both the predecessor and successor States (Vienna Convention on Succession of States in Respect of State Property, Archives and Debts, 1983, arts. 20–31). Some archives should pass to the successor. Others may require copies, shared access, preservation duties, or negotiated arrangements.

The best approach is not simple physical possession. The key questions are relevance, territorial connection, administrative need, historical value, and protection of individual rights.

9.5 Public debts

Debt succession is the most politically charged part of the doctrine. Money creates sharper conflict than formal status. Creditors want continuity; successor States want fairness; populations resist paying for debts they did not approve or benefit from.

Different debts require different treatment. National debt concerns obligations incurred for the predecessor State as a whole. Localised debt is connected to a specific territory or project. Project debt may have financed infrastructure in the successor territory. War debt may be linked to military operations. Secured debt may attach to particular assets. Odious debt arguments challenge obligations incurred by oppressive regimes without benefit to the population (Feilchenfeld, 1931; Howse, 2007).

No single formula works for all categories. A new State should not automatically inherit every debt of the predecessor. Equally, it cannot always reject liabilities connected to territory, assets, or benefits it receives.

Debt succession exposes the real tension in succession law: legal continuity, creditor expectations, public benefit, democratic legitimacy, and economic capacity rarely point in the same direction.

9.6 Equity and apportionment

Equity is necessary because succession cases differ sharply. A rigid formula can produce unfair results. Yet equity is also dangerous because it can become vague if not tied to concrete factors.

A serious analysis should treat equity as structured reasoning, not open discretion. Relevant factors include territorial connection, actual benefit, population ratio, contribution to the predecessor State’s assets, capacity to pay, location of property, assumption of institutions, and negotiated settlement.

The 1983 Convention relies heavily on equitable proportions, especially for debts and property division (Vienna Convention on Succession of States in Respect of State Property, Archives and Debts, 1983, arts. 37–41). That flexibility is useful, but it partly explains why the Convention attracted limited support. States often prefer negotiated control over uncertain equitable standards.

The stronger position is practical: law supplies principles, but agreement usually supplies the final allocation.

10. Nationality And Private Rights

10.1 Nationality as the human core

State succession is often presented as a technical subject, but nationality is where it becomes personal. A border change can turn citizens into foreigners. A dissolution can leave people trapped between new nationality laws. A secession can expose minorities to exclusion. A restored State can force hard questions about residents, migrants, refugees, and former officials.

Nationality matters because it connects the individual to political membership and legal protection. It affects voting, residence, employment, property ownership, diplomatic protection, social benefits, travel documents, and access to courts. Succession without nationality protection can create statelessness on a large scale.

This is why succession cannot be analysed only through treaties, assets, and debts. The human position is not secondary. It is one of the main tests of whether the legal transition is legitimate.

10.2 The right to a nationality

The International Law Commission’s Articles on Nationality of Natural Persons in Relation to the Succession of States begin with a direct rule: every person who had the nationality of the predecessor State has the right to the nationality of at least one State concerned (International Law Commission, 1999, art. 1).

This rule does not mean that every person may choose any nationality at will. It means that succession should not leave people without legal membership. The States concerned must organise their nationality laws so that every affected person has a real legal link to at least one successor or continuing State.

The rule also shifts the analysis away from State convenience. Nationality after succession is not only an internal matter. It has international consequences because statelessness, discrimination, and arbitrary exclusion affect the rights of individuals and the stability of the new territorial order.

10.3 Prevention of statelessness

Preventing statelessness is the central obligation. The General Assembly invited governments to take account of the ILC Articles, especially where succession could leave individuals without nationality (United Nations General Assembly, 2000).

The risk is obvious after dissolution or separation. Some people may live in one successor State, originate from another, belong to a minority group, or have mixed family links. If nationality laws are drafted narrowly, they may fall through the gaps.

International law already contains broader anti-statelessness principles, including the Convention on the Reduction of Statelessness and human rights rules against arbitrary deprivation of nationality (Convention on the Reduction of Statelessness, 1961; ICCPR, 1966, art. 24(3)). Succession intensifies those concerns because nationality changes may affect whole populations at once.

The legal priority is continuity of protection. A person should not become legally invisible because sovereignty has changed.

10.4 Habitual residence

Habitual residence is often the most practical connecting factor. It identifies where a person actually lives, works, pays taxes, raises a family, uses public services, and participates in local society.

This is usually more workable than ethnicity, language, ancestry, or political loyalty. Those criteria can be manipulated and may produce discriminatory outcomes. Habitual residence is not perfect, but it is administratively clearer and less likely to turn nationality into ethnic sorting.

The ILC Articles use habitual residence as an important presumption in several succession scenarios (International Law Commission, 1999, arts. 5, 22–24). The reason is practical justice. People should usually receive the nationality of the State with which their daily life is most closely connected.

Exceptions may be needed for refugees, displaced persons, diaspora communities, and people unable to return because of conflict or persecution. Residence must be applied with flexibility where displacement was not voluntary.

10.5 Right of option

The right of option matters where a person has genuine links to more than one State concerned. This may happen after dissolution, border changes, or separation. A person may reside in one successor State, originate from another, belong to a family divided by a new border, or have property and employment ties across the former State.

Option reduces hardship. It allows individuals to choose the nationality that best reflects their real connection. It also helps prevent forced nationality, especially for minorities who may not identify with the new territorial majority.

The right must be meaningful. A formal option is not enough if deadlines are unreasonable, procedures are inaccessible, documents are unavailable, or exercising the option leads to expulsion, loss of property, or retaliation.

Well-designed option regimes can reduce post-succession instability. Poorly designed ones can deepen ethnic division and create new grievances.

10.6 Non-discrimination

Nationality laws after succession can become tools of exclusion. The main risks are ethnic citizenship rules, language tests designed to exclude minorities, gender discrimination, political retaliation, residence requirements aimed at displaced groups, and mass denationalisation.

International law rejects arbitrary and discriminatory deprivation of nationality. The ILC Articles require States concerned to respect non-discrimination and to avoid decisions based on grounds such as ethnic origin, religion, language, or political opinion (International Law Commission, 1999, art. 15).

This is not only a human rights issue. It affects recognition and stability. A successor State that excludes large parts of the population may weaken its claim to represent the territory as a whole. It may also create refugee flows, statelessness, minority conflict, and diplomatic disputes.

Nationality should not be used to rewrite the population of the State.

10.7 Acquired private rights

Succession also affects private rights. These include property ownership, pensions, public employment rights, licences, concessions, corporate rights, social benefits, contract claims, court judgments, land titles, and pending litigation.

The central problem is reliance. Individuals and companies organise their lives around legal rights created before succession. If every right disappears at the moment of territorial change, legal certainty collapses.

International law does not provide a single universal rule for all acquired rights. The stronger position is that private rights should be preserved unless a lawful public measure changes them with due process and, where required, compensation. This is especially important for land rights, pensions, employment benefits, and judicial decisions.

Public concessions and licences require careful treatment. Some may continue because they are tied to local economic activity. Others may be reviewed if they were granted unlawfully, corruptly, or in violation of self-determination. The point is not automatic preservation at any cost. It is a legal continuity subject to lawful regulation.

Nationality and private rights show why succession is not only a matter between States. It reaches individuals directly. A legally sound succession process must protect people from statelessness, discrimination, arbitrary loss of rights, and administrative erasure.

11. International Organisations

11.1 Membership is not automatic

Membership in international organisations does not normally pass automatically through State succession. The starting point is the organisation’s constituent instrument. Each organisation decides membership, continuity, representation, voting rights, financial obligations, and admission through its own rules and practices (Aust, 2005; Klabbers, 2024).

This is different from ordinary treaty succession. A State may claim to continue treaty obligations, but membership in an organisation usually depends on institutional acceptance. The organisation must know who the member is, who represents it, who pays contributions, who votes, and who is bound by institutional decisions.

This point is important for State Recognition because recognition by individual States does not guarantee institutional membership. An entity may be recognised by many States and still fail to enter an organisation if the relevant admission procedure is blocked. The United Nations is the clearest example.

Institutional practice can also shape the legal character of a territorial change. If an organisation treats one entity as a continuing member, continuity is strengthened. If it requires new applications, dissolution or succession is confirmed in practice.

11.2 UN admission and continuity

Article 4 of the United Nations Charter governs admission. Membership is open to peace-loving States that accept the obligations of the Charter and, in the judgment of the organisation, are able and willing to carry them out. Admission requires a decision of the General Assembly on the recommendation of the Security Council (UN Charter, 1945, art. 4).

This means that statehood alone is not enough. The applicant must pass through a political and legal process. The Security Council’s recommendation is indispensable, and the veto power of permanent members can block admission even where the applicant has broad recognition.

Continuity is different. If an entity is accepted as the same State that already holds membership, no fresh admission is required. The issue is not Article 4 admission but identity. That is why continuity disputes can be more important than recognition disputes inside organisations.

The practical consequence is sharp. A new State may need admission. A continuing State keeps the seat. A contested authority claiming to represent an existing member may face a credentials issue rather than an admission issue.

11.3 Continuator States

A continuator State claims that it is legally the same international person as the predecessor State. If the claim is accepted, the State retains memberships, treaty positions, institutional rights, and obligations without applying as a new member.

Russia’s continuation of the Soviet Union’s United Nations seat is the leading modern example. After the USSR dissolved, Russia was accepted as continuing the Soviet legal personality for UN purposes, including the permanent seat on the Security Council. This was not a neutral mechanical rule. It was a special settlement shaped by political necessity, nuclear responsibility, territorial scale, administrative continuity, and the absence of decisive institutional resistance (Klabbers, 2024).

The example should be handled carefully. Russia was not accepted as a continuator simply because it was the largest former Soviet republic. The result depended on acceptance by relevant actors and the institutional need to avoid a Security Council crisis.

Other successor States of the USSR did not inherit the Soviet seat. They joined or participated in organisations in their own right. That contrast shows the difference between continuation and succession.

11.4 Dissolution and new admissions

Dissolution normally points away from a single continuator. If the predecessor State disappears and several new States emerge, the organisation may require new admissions or separate institutional arrangements.

Yugoslavia is the decisive example. Serbia and Montenegro claimed that the Federal Republic of Yugoslavia continued the Socialist Federal Republic of Yugoslavia. That claim was rejected. The Security Council and General Assembly treated the former Yugoslavia as having ceased to exist for UN membership purposes and required the Federal Republic of Yugoslavia to apply for membership rather than continue the old seat (UN Security Council, 1992; UN General Assembly, 1992).

Czechoslovakia followed a more orderly path. Its dissolution into the Czech Republic and Slovakia was negotiated, and both successor States entered the United Nations as separate members. The institutional practice confirmed that it neither simply continued the whole predecessor State for UN purposes (Scharf, 1995).

These examples show that institutional response can confirm the legal classification of the event. Acceptance of continuity preserves a seat. Rejection of continuity forces admission or new participation. The organisation’s practice becomes part of the evidence of identity, succession, and recognition.

11.5 Credentials and representation

Credentials disputes are different from admission disputes. Admission asks whether an entity may become a member State. Credentials ask who may represent a State that is already a member.

This distinction is often missed. Rival governments may claim the same seat, but the State itself may not be in doubt. The legal problem is representation. Who signs, votes, speaks, receives documents, and participates in the organisation’s work?

Credentials decisions can operate like practical recognition of governments. They may not formally decide the legality of a regime, but they determine who can act for the State inside the institution. That decision can affect access to meetings, treaty action, institutional communications, and political legitimacy.

The UN General Assembly’s credentials practice has often avoided broad doctrinal declarations. It may accept, reject, defer, or leave credentials unresolved. This gives the organisation flexibility, but it also means that credentials practice should not be overstated as a final ruling on statehood.

11.6 Financial institutions and treaty bodies

Financial institutions, regional organisations, and treaty bodies follow their own rules. The International Monetary Fund and World Bank focus on membership, quotas, financial obligations, asset allocation, and the capacity of the member to assume institutional duties. Regional organisations may add political, democratic, human rights, or geographic requirements.

Human rights treaty bodies face a different problem. Their concern is continuity of protection. If a State dissolves or territory changes hands, the key question is often how to avoid a gap in treaty protection for individuals. This is why human rights bodies have tended to resist the idea that succession can simply erase obligations owed to people under jurisdiction (Human Rights Committee, 1997).

Depositary practice also matters. Treaty depositaries record notifications of succession, declarations of continuity, accessions, reservations, and objections. Their practice does not always settle contested statehood, but it shapes how treaty participation operates in daily legal life.

The main rule is institutional specificity. General succession law provides background principles, but the legal answer often turns on the organisation’s charter, voting practice, membership decisions, credentials rules, depositary practice, and the political judgment of organs competent to decide.

12. Claims, Responsibility, And Litigation

12.1 Responsibility of the predecessor State

State succession does not erase wrongful acts. If the predecessor State breached an international obligation before the territorial change, the legal problem is not whether the wrong occurred. The harder question is who may claim reparation, who must provide it, and how responsibility operates after the predecessor changes, disappears, or loses territory.

The basic rules of State responsibility remain relevant. A wrongful act exists where conduct attributable to a State breaches an international obligation binding on that State (International Law Commission, 2001, arts. 2, 4–11). Succession does not rewrite the past. It changes the institutional setting in which consequences must be addressed.

If the predecessor State continues, the ordinary rule is simpler: it remains responsible for its prior wrongful acts. A State cannot avoid liability by losing territory, changing its constitution, or recognising a new State on part of its former territory. Continuity preserves responsibility.

The harder case is dissolution. If the predecessor State disappears, there may be no continuing State against which the claim can be brought. That does not mean the wrong becomes legally irrelevant. It means that responsibility must be addressed through succession agreements, claims commissions, institutional arrangements, or arguments about attribution, benefit, and continuity (Craven, 1998; Dumberry, 2007).

12.2 Responsibility of Successor States

The passage of responsibility to successor States is contested. A specialist analysis must avoid a simple rule that successor States either always inherit responsibility or never do. Practice is too uneven for that.

The International Law Commission’s work on succession in respect of State responsibility reflects this difficulty. It recognises that some obligations and claims may be affected by succession, but it does not turn succession into automatic liability for every prior wrongful act (International Law Commission, 2022).

Several factors matter. If the successor State continues the identity of the predecessor, responsibility normally continues. If it benefited directly from the wrongful act, an argument for bearing consequences becomes stronger. If it controls the territory where the wrong occurred or the evidence, victims, assets, or continuing effects are located, it may have duties linked to cessation, restitution, investigation, or guarantees of non-repetition.

Unjust enrichment is also relevant. A successor State should not keep assets, territory, or benefits produced by an internationally wrongful act while denying all linked obligations. But that logic has limits. A newly independent State should not automatically bear colonial wrongs committed by the predecessor power against the people of that territory.

Treaty arrangements can settle the issue more clearly than general doctrine. Succession agreements may allocate liabilities, preserve claims, establish compensation funds, or divide responsibility by territory, population, asset share, or specific categories of injury.

12.3 Pending disputes

Pending disputes become unstable when succession occurs. An ICJ case, arbitral claim, investment dispute, human rights petition, or diplomatic protection claim may depend on the identity of the parties, nationality of claimants, treaty continuity, jurisdictional consent, and the survival of the respondent State.

Before the ICJ, jurisdiction depends on consent. If a predecessor State disappears, a successor State is not automatically bound by every jurisdictional commitment unless continuity, treaty succession, or a specific declaration supports that result. The Bosnia Genocide case exposed these problems in relation to Yugoslavia, treaty succession, and the Genocide Convention (ICJ, 1996; Craven, 1998).

Investment arbitration raises similar questions. A bilateral investment treaty may continue, lapse, or require confirmation. If nationality changes after succession, investors may gain or lose treaty protection. If the respondent State changes, tribunals must examine treaty succession, consent to arbitration, attribution, and the date of the alleged breach.

Human rights petitions require particular caution. If rights attach to individuals under jurisdiction, succession should not create a protection gap. Treaty bodies and regional courts may still need to address violations that began before succession but continued after it, especially where detention, disappearance, property deprivation, discrimination, or nationality loss remains unresolved.

Pending litigation should not be treated as automatically extinguished. The better method is to examine the forum’s jurisdiction, the applicable treaty, identity or succession of the parties, continuity of the wrongful situation, and any settlement agreement.

12.4 Diplomatic protection

Diplomatic protection depends on nationality. A State may bring a claim for injury to its national, but the nationality link must satisfy the applicable rules. Succession complicates this because individuals may acquire a new nationality, lose the predecessor nationality, become stateless, or retain competing links to more than one State concerned.

The ILC Articles on Diplomatic Protection require nationality at the relevant stages of the claim, subject to specific qualifications (International Law Commission, 2006, arts. 5–8). Succession may disrupt that chain. If a person injured before succession later becomes a national of a successor State, the question becomes whether that successor may espouse the claim.

The issue is not only formal. If nationality laws after succession exclude minorities or displaced persons, diplomatic protection may be denied precisely to those most affected by the territorial change. That is why the ILC Articles on Nationality in Relation to the Succession of States are important: nationality allocation after succession shapes access to international protection (International Law Commission, 1999).

Corporate claims create another layer. A company incorporated in the predecessor State may become linked to a successor State, relocate, lose legal status, or fall under a new investment treaty network. Tribunals and courts must examine incorporation, seat, control, treaty definitions, and timing.

Nationality after succession is not an administrative detail. It can determine who has standing, who may claim, and whose injury remains without an international sponsor.

12.5 Reparations and settlement agreements

Reparation after succession is often resolved politically but framed legally. States use agreements, claims commissions, peace treaties, lump-sum settlements, arbitration clauses, compensation funds, and asset-sharing arrangements to convert contested responsibility into workable obligations.

The legal forms vary. A peace agreement may waive claims. A succession agreement may divide liabilities. A claims commission may process individual or corporate losses. A lump-sum settlement may close categories of claims without deciding every issue of attribution. These tools are imperfect, but they often provide more certainty than abstract litigation.

Post-conflict settlements show the pattern. Responsibility for wrongful acts is rarely separated from property division, debt allocation, archives, missing persons, pensions, refugee return, and nationality. Legal responsibility becomes part of a broader settlement of the successor States’ relationship.

This does not make responsibility merely political. International law supplies the vocabulary: attribution, breach, cessation, restitution, compensation, satisfaction, non-repetition, waiver, and reservation of claims (International Law Commission, 2001, arts. 28–39). But the final architecture often comes through a negotiated settlement.

The main point is that succession does not create a legal amnesty. It changes the path through which claims are pursued. Where continuity exists, responsibility normally continues. Where dissolution or separation occurs, responsibility must be allocated through identity, benefit, control, treaty continuity, nationality, institutional jurisdiction, and agreement.

Also Read

• Principle of Self-Determination of Peoples

• Principle of Territorial Integrity in International Law

• The Vienna Convention on Succession of States in Respect of Treaties

• The Right to Nationality in International Law

• How International Law Deals with Stateless Persons

• Territorial Disputes and International Law: Principles, Cases and Resolutions

• Nagorno-Karabakh: War, Rights, and Settlement

• Legal Status of Indigenous Peoples in International Law

13. Case Studies And Doctrinal Lessons

13.1 Germany

German reunification is best understood as continuity through absorption, not as the creation of a wholly new German State. The German Democratic Republic joined the Federal Republic of Germany, and the Federal Republic continued its international legal personality. That classification mattered because Germany did not need to reapply for membership in the United Nations, the European Communities, NATO, or other institutions (Oeter, 1991; Randelzhofer, 1991).

The legal lesson is precise: political unity and legal continuity are not the same thing. A dramatic constitutional and territorial transformation may occur without extinguishing the continuing State. The Federal Republic remained the same legal person, but its territorial scope expanded.

Treaty succession followed that logic. The Federal Republic’s treaties generally extended to the former territory of the German Democratic Republic, while many GDR treaties required termination, review, or adjustment. The issue was not only which State survived, but which treaty obligations could sensibly operate in the enlarged German territory (Klabbers, 2024).

Germany also shows why succession analysis begins with identity. If a new German State had been created, institutional membership, treaty obligations, debts, diplomatic property, and claims would have required a different legal treatment.

13.2 USSR, Russia, and the Baltic States

The Soviet collapse produced three different models at once: continuation, succession, and restored statehood. Russia was accepted as the continuator of the USSR for major institutional purposes, especially the Soviet seat on the Security Council. The other former Soviet republics were treated mostly as successor States or newly independent States in their own right (Craven, 1998; Crawford, 2006).

Russia’s continuation was not automatic. It was accepted because of political agreement, institutional necessity, nuclear responsibility, administrative continuity, and the absence of decisive opposition. This makes Russia a special case, not a universal rule that the largest successor always continues the predecessor.

The Baltic States followed another path. Estonia, Latvia, and Lithuania did not present themselves as ordinary successor States of the USSR. Their claim rested on legal continuity after unlawful Soviet annexation. Many States had refused to recognise that annexation, which preserved the argument that Baltic statehood continued despite loss of effective control (Aust, 2005; Crawford, 2006).

The doctrinal lesson is sharp. One territorial collapse can produce different legal outcomes for different entities. Continuation, succession, and restored statehood must be separated.

13.3 Yugoslavia

Yugoslavia is the strongest modern warning against self-judged continuity. Serbia and Montenegro claimed that the Federal Republic of Yugoslavia continued the Socialist Federal Republic of Yugoslavia. That claim was rejected by the Security Council and the General Assembly (UN Security Council, 1992; UN General Assembly, 1992).

The Badinter Commission treated the Socialist Federal Republic of Yugoslavia as being in dissolution. That view shaped recognition policy, UN participation, treaty succession, and later negotiations over property, archives, debts, and acquired rights (Pellet, 1992; Craven, 1998).

Yugoslavia also shows how succession becomes practical very quickly. The successor States had to address diplomatic and consular properties, financial assets, archives, pensions, debts, and treaty participation. The 2001 Agreement on Succession Issues demonstrates that negotiated settlements often provide more certainty than abstract doctrine.

The legal lesson is that recognition of a State does not imply acceptance of its claim to continue a predecessor. Serbia and Montenegro could be treated as a State without being treated as the sole continuation of Yugoslavia.

13.4 Czechoslovakia

Czechoslovakia shows the stabilising effect of the agreement. Its dissolution into the Czech Republic and Slovakia was peaceful, negotiated, and institutionally managed. Both successor States entered the United Nations separately and assumed their own international positions (Scharf, 1995).

The legal disputes did not disappear. Nationality, assets, debts, treaties, archives, and institutional participation still require arrangement. The difference was that the agreement reduced uncertainty and prevented recognition from becoming a geopolitical crisis.

This case proves that succession law works best when the States concerned settle practical consequences directly. The doctrine provides categories; agreement provides the working solution.

13.5 Kosovo

Kosovo is often overstated. The ICJ did not hold that Kosovo had a right to secede, did not decide that Kosovo was a State for all purposes, and did not require recognition by other States. The Court held only that the declaration of independence did not violate general international law, Security Council Resolution 1244, or the applicable constitutional framework in the manner argued before it (ICJ, 2010).

Kosovo separates five questions that are often confused: declaration of independence, legality of secession, statehood, recognition, and UN membership. A declaration may be lawful without automatically creating a State. Statehood still requires separate analysis. Recognition remains divided. UN membership depends on Article 4 of the Charter and the Security Council's recommendation.

For State Recognition, Kosovo’s lesson is methodological. The legal analysis must not jump straight from a declaration to full statehood. The correct sequence is legality, effectiveness, independence, recognition, and institutional participation.

13.6 South Sudan and Timor-Leste

South Sudan and Timor-Leste show how consent or international supervision can reduce controversy over new statehood. South Sudan emerged after a peace agreement and a referendum. Timor-Leste moved toward independence through United Nations involvement after Indonesian occupation and a UN-administered transition (Crawford, 2006; Vidmar, 2013).

Both cases still produced complex succession issues. New treaty participation had to be organised. Nationality questions had to be settled. Public assets, archives, borders, natural resources, and institutional membership required legal and political management.

South Sudan also shows that recognition does not solve post-independence disputes. Resource division, debt, border areas, citizenship, and security arrangements remained difficult after independence. Timor-Leste similarly shows that internationally supervised independence can clarify statehood while leaving economic and institutional reconstruction as a separate legal challenge.

The doctrinal point is direct: consensual or supervised independence helps recognition, but succession still requires detailed implementation.

13.7 Palestine and Taiwan

Palestine and Taiwan show the limits of a purely Montevideo-style analysis when recognition is divided. Both cases involve high political sensitivity, functional legal practice, and contested institutional participation, but their legal profiles differ.

Palestine has broad recognition and significant participation in international legal processes, including observer State status at the United Nations and treaty participation in several regimes. Yet occupation, territorial fragmentation, divided governance, and unresolved final-status issues complicate the statehood analysis (Quigley, 2010; ICJ, 2004; ICJ, 2024).

Taiwan presents the opposite pattern. It has stable institutions, a defined territory, a permanent population, and extensive economic and practical relations. Its difficulty lies in formal recognition, UN participation, and the One China policies adopted by many States (Crawford, 2006; Grant, 1999).

These examples prove that recognition is not a mere academic question. It determines access to institutions, treaty practice, diplomatic relations, litigation, aviation, trade, and asset control. They also show that statehood criteria, although essential, do not fully explain the legal reality where political recognition is divided.

The final lesson is that State Recognition, continuity, and succession must be applied together but not merged. Germany teaches continuity. Russia and the Baltic States teach differentiated identity. Yugoslavia teaches rejected continuity. Czechoslovakia teaches negotiated dissolution. Kosovo teaches doctrinal caution. South Sudan and Timor-Leste teach managed independence. Palestine and Taiwan teach the practical force of partial recognition.

Conclusion

State Recognition and State succession are connected doctrines, but they perform different legal functions. Recognition concerns acceptance: whether an entity is treated as a State, whether an authority is accepted as a government, or whether a representative may speak for an existing State. Succession concerns consequences: what happens to treaties, property, archives, debts, nationality, claims, institutional participation, and private rights when responsibility for territory changes.

The difference matters because international law cannot answer these questions through one formula. An entity may be widely recognised but still face unresolved succession issues. A successor State may inherit some legal positions but not others. A government may be recognised for practical dealings without changing the identity of the State. A State may continue despite revolution, occupation, territorial loss, or institutional collapse.

Continuity is the decisive bridge. If the same State continues, rights and obligations usually remain with it. If the predecessor State disappears, separates, merges, or loses responsibility for territory, succession rules become necessary. If an annexation or territorial claim rests on unlawful force, non-recognition prevents illegality from becoming legal title.

Recognition is legally relevant, but it is not legally omnipotent. It cannot create statehood where independence, legality, and effective authority are absent. Succession is legally structured, but it is not mechanically codified. Its consequences depend on subject matter, treaty rules, custom, institutional practice, equity, and agreement. International law uses both doctrines to balance effectiveness, legality, stability, and protection of individuals.

References

1. Agreement on Succession Issues (2001) 2262 UNTS 251, Vienna, 29 June 2001 [online]. Available at: https://treaties.un.org/doc/source/recenttexts/29-1.pdf (Accessed: 01 May 2026).

2. Arbitration Commission of the Peace Conference on Yugoslavia (1992) ‘Opinions on questions arising from the dissolution of Yugoslavia’, International Legal Materials, 31(6), pp. 1488–1526.

3. Aust, A. (2005) Handbook of International Law. Cambridge: Cambridge University Press.

4. Buchanan, A. (2004) Justice, Legitimacy, and Self-Determination: Moral Foundations for International Law. Oxford: Oxford University Press.

5. Bunn, G. and Rhinelander, J.B. (1993) ‘The Arms Control Obligations of the Former Soviet Union’, Virginia Journal of International Law, 33, pp. 323–376.

6. Cassese, A. (1995) Self-Determination of Peoples: A Legal Reappraisal. Cambridge: Cambridge University Press.

7. Convention on the Reduction of Statelessness (1961) 989 UNTS 175 [online]. Available at: https://legal.un.org/ilc/texts/instruments/english/conventions/6_1_1961.pdf (Accessed: 01 May 2026).

8. Craven, M.C.R. (1998) ‘The Problem of State Succession and the Identity of States under International Law’, European Journal of International Law, 9(1), pp. 142–162.

9. Crawford, J. (2006) The Creation of States in International Law. 2nd edn. Oxford: Oxford University Press.

10. Dumberry, P. (2007) State Succession to International Responsibility. Leiden: Martinus Nijhoff.

11. Dumberry, P. (2015) State Succession to International Responsibility. Leiden: Brill Nijhoff.

12. Feilchenfeld, E.H. (1931) Public Debts and State Succession. New York: The Macmillan Company.

13. Geneva Convention IV (1949) Geneva Convention relative to the Protection of Civilian Persons in Time of War, 75 UNTS 287.

14. González Hauck, S., Kunz, R. and Milas, M. (eds.) (2024) Public International Law: A Multi-Perspective Approach. Abingdon: Routledge [online]. Available at: https://www.taylorfrancis.com/books/oa-edit/10.4324/9781003451327/public-international-law-su%C3%A9-gonz%C3%A1lez-hauck-raffaela-kunz-max-milas (Accessed: 01 May 2026).

15. Grant, T.D. (1999) The Recognition of States: Law and Practice in Debate and Evolution. Westport, CT: Praeger.

16. Great Britain v Costa Rica (Tinoco Arbitration) (1923) 1 Reports of International Arbitral Awards 369.

17. Hague Regulations (1907) Regulations Respecting the Laws and Customs of War on Land, annexed to Hague Convention IV respecting the Laws and Customs of War on Land.

18. Howse, R. (2007) The Concept of Odious Debt in Public International Law. UNCTAD Discussion Paper No. 185 [online]. Available at: https://unctad.org/system/files/official-document/osgdp20074_en.pdf (Accessed: 02 May 2026).

19. Human Rights Committee (1997) General Comment No. 26: Continuity of Obligations, CCPR/C/21/Rev.1/Add.8/Rev.1 [online]. Available at: https://www.refworld.org/legal/general/hrc/1997/7943 (Accessed: 02 May 2026).

20. International Court of Justice (1971) Legal Consequences for States of the Continued Presence of South Africa in Namibia notwithstanding Security Council Resolution 276 (1970), Advisory Opinion, ICJ Reports 1971, p. 16.

21. International Court of Justice (1975) Western Sahara, Advisory Opinion, ICJ Reports 1975, p. 12.

22. International Court of Justice (1986) Frontier Dispute (Burkina Faso/Republic of Mali), Judgment, ICJ Reports 1986, p. 554.

23. International Court of Justice (1995) East Timor (Portugal v Australia), Judgment, ICJ Reports 1995, p. 90.

24. International Court of Justice (1996) Application of the Convention on the Prevention and Punishment of the Crime of Genocide (Bosnia and Herzegovina v Yugoslavia), Preliminary Objections, Judgment, ICJ Reports 1996, p. 595.

25. International Court of Justice (2004) Legal Consequences of the Construction of a Wall in the Occupied Palestinian Territory, Advisory Opinion, ICJ Reports 2004, p. 136.

26. International Court of Justice (2010) Accordance with International Law of the Unilateral Declaration of Independence in Respect of Kosovo, Advisory Opinion, ICJ Reports 2010, p. 403.

27. International Court of Justice (2024) Legal Consequences Arising from the Policies and Practices of Israel in the Occupied Palestinian Territory, including East Jerusalem, Advisory Opinion of 19 July 2024 [online]. Available at: https://www.icj-cij.org/case/186 (Accessed: 02 May 2026).

28. International Covenant on Civil and Political Rights (1966) 999 UNTS 171.

29. International Covenant on Economic, Social and Cultural Rights (1966) 993 UNTS 3.

30. International Law Commission (1981) Draft Articles on Succession of States in Respect of State Property, Archives and Debts, with Commentaries, Yearbook of the International Law Commission, 1981, Vol. II, Part Two [online]. Available at: https://legal.un.org/ilc/texts/instruments/english/commentaries/3_3_1981.pdf (Accessed: 03 May 2026).

31. International Law Commission (1999) Draft Articles on Nationality of Natural Persons in Relation to the Succession of States, with Commentaries, Yearbook of the International Law Commission, 1999, Vol. II, Part Two [online]. Available at: https://legal.un.org/ilc/texts/instruments/english/draft_articles/3_4_1999.pdf (Accessed: 04 May 2026).

32. International Law Commission (2001) Draft Articles on Responsibility of States for Internationally Wrongful Acts, with Commentaries, Yearbook of the International Law Commission, 2001, Vol. II, Part Two [online]. Available at: https://legal.un.org/ilc/texts/instruments/english/commentaries/9_6_2001.pdf (Accessed: 04 May 2026).

33. International Law Commission (2006) Draft Articles on Diplomatic Protection, with Commentaries, Yearbook of the International Law Commission, 2006, Vol. II, Part Two [online]. Available at: https://legal.un.org/ilc/texts/instruments/english/commentaries/9_8_2006.pdf (Accessed: 04 May 2026).

34. International Law Commission (2020) Sea-Level Rise in Relation to International Law: First Issues Paper, A/CN.4/740 [online]. Available at: https://legal.un.org/ilc/documentation/english/a_cn4_740.pdf (Accessed: 04 May 2026).

35. International Law Commission (2022) Report on the Work of its Seventy-Third Session, A/77/10, Chapter VII: Succession of States in respect of State responsibility [online]. Available at: https://legal.un.org/ilc/reports/2022/ (Accessed: 04 May 2026).

36. International Law Commission (2023) Sea-Level Rise in Relation to International Law: Additional Paper to the First Issues Paper, A/CN.4/761 [online]. Available at: https://digitallibrary.un.org/record/4009306 (Accessed: 05 May 2026).

37. Klabbers, J. (2024) International Law. 4th edn. Cambridge: Cambridge University Press.

38. Lauterpacht, H. (1947) Recognition in International Law. Cambridge: Cambridge University Press.

39. Montevideo Convention on the Rights and Duties of States (1933) 165 LNTS 19 [online]. Available at: https://treaties.un.org/pages/showdetails.aspx?objid=0800000280166aef (Accessed: 05 May 2026).

40. Oeter, S. (1991) ‘German Unification and State Succession’, Zeitschrift für ausländisches öffentliches Recht und Völkerrecht, 51, pp. 349–383.

41. Pacific Islands Forum (2021) Declaration on Preserving Maritime Zones in the Face of Climate Change-related Sea-Level Rise [online]. Available at: https://www.forumsec.org/2021/08/11/declaration-on-preserving-maritime-zones-in-the-face-of-climate-change-related-sea-level-rise/ (Accessed: 06 May 2026).

42. Pellet, A. (1992) ‘The Opinions of the Badinter Arbitration Committee: A Second Breath for the Self-Determination of Peoples’, European Journal of International Law, 3(1), pp. 178–185.

43. Quigley, J. (2010) The Statehood of Palestine: International Law in the Middle East Conflict. Cambridge: Cambridge University Press.

44. Randelzhofer, A. (1991) ‘German Unification: Constitutional and International Implications’, Michigan Journal of International Law, 13(1), pp. 122–143.

45. Roth, B.R. (1999) Governmental Illegitimacy in International Law. Oxford: Clarendon Press.

46. Scharf, M.P. (1995) ‘Musical Chairs: The Dissolution of States and Membership in the United Nations’, Cornell International Law Journal, 28(1), pp. 29–69.

47. Shaw, M.N. (2021) International Law. 9th edn. Cambridge: Cambridge University Press.

48. Stahn, C. (2002) ‘The Agreement on Succession Issues of the Former Socialist Federal Republic of Yugoslavia’, American Journal of International Law, 96(2), pp. 379–397.

49. Supreme Court of Canada (1998) Reference re Secession of Quebec, [1998] 2 SCR 217.

50. Talmon, S. (1998) Recognition of Governments in International Law: With Particular Reference to Governments in Exile. Oxford: Clarendon Press.

51. Thornberry, P. (1991) International Law and the Rights of Minorities. Oxford: Clarendon Press.

52. United Nations (1945) Charter of the United Nations [online]. Available at: https://www.un.org/en/about-us/un-charter/full-text (Accessed: 14 May 2026).

53. United Nations General Assembly (1960) Declaration on the Granting of Independence to Colonial Countries and Peoples, A/RES/1514(XV) [online]. Available at: https://digitallibrary.un.org/record/206145 (Accessed: 14 May 2026).

54. United Nations General Assembly (1970) Declaration on Principles of International Law concerning Friendly Relations and Co-operation among States in accordance with the Charter of the United Nations, A/RES/2625(XXV) [online]. Available at: https://treaties.un.org/doc/source/docs/A_RES_2625-Eng.pdf (Accessed: 14 May 2026).

55. United Nations General Assembly (1992) Recommendation of the Security Council of 19 September 1992, A/RES/47/1 [online]. Available at: https://digitallibrary.un.org/record/150880/files/A_RES_47_1-EN.pdf (Accessed: 14 May 2026).

56. United Nations General Assembly (2000) Nationality of Natural Persons in Relation to the Succession of States, A/RES/55/153 [online]. Available at: https://digitallibrary.un.org/record/429362 (Accessed: 14 May 2026).

57. United Nations General Assembly (2007) United Nations Declaration on the Rights of Indigenous Peoples, A/RES/61/295 [online]. Available at: https://docs.un.org/en/A/res/61/295 (Accessed: 14 May 2026).

58. United Nations General Assembly (2014) Territorial Integrity of Ukraine, A/RES/68/262 [online]. Available at: https://digitallibrary.un.org/record/767883 (Accessed: 14 May 2026).

59. United Nations General Assembly (2022) Territorial Integrity of Ukraine: Defending the Principles of the Charter of the United Nations, A/RES/ES-11/4 [online]. Available at: https://docs.un.org/en/A/RES/ES-11/4 (Accessed: 14 May 2026).

60. United Nations Security Council (1992) Resolution 777 (1992), S/RES/777(1992) [online]. Available at: https://digitallibrary.un.org/record/150175 (Accessed: 14 May 2026).

61. United Nations Treaty Collection (2026a) Vienna Convention on Succession of States in respect of Treaties: Status [online]. Available at: https://treaties.un.org/pages/ViewDetails.aspx?chapter=23&clang=_en&mtdsg_no=XXIII-2&src=TREATY (Accessed: 14 May 2026).

62. United Nations Treaty Collection (2026b) Vienna Convention on Succession of States in Respect of State Property, Archives and Debts: Status [online]. Available at: https://treaties.un.org/Pages/ViewDetails.aspx?chapter=3&clang=_en&mtdsg_no=III-12&src=IND (Accessed: 14 May 2026).

63. Vidmar, J. (2013) Democratic Statehood in International Law: The Emergence of New States in Post-Cold War Practice. Oxford: Hart Publishing.

64. Vienna Convention on Diplomatic Relations (1961) 500 UNTS 95.

65. Vienna Convention on the Law of Treaties (1969) 1155 UNTS 331.

66. Vienna Convention on Succession of States in Respect of Treaties (1978) 1946 UNTS 3 [online]. Available at: https://legal.un.org/ilc/texts/instruments/english/conventions/3_2_1978.pdf (Accessed: 14 May 2026).

67. Vienna Convention on Succession of States in Respect of State Property, Archives and Debts (1983) UN Doc. A/CONF.117/14 [online]. Available at: https://legal.un.org/ilc/texts/instruments/english/conventions/3_3_1983.pdf (Accessed: 14 May 2026).