International Law

The One Thing

International law is a consent-based but developing system of rules and principles governing states and, in some circumstances, international organisations, individuals and other global actors. It promotes peaceful cooperation, human rights and accountability through treaties, customary law, general principles and international institutions, although its effectiveness is constrained by state sovereignty, jurisdiction and political enforcement.

Chronology

Who and What

• International Law: Rules and principles regulating relations between states and other recognised participants in the international community. It promotes peaceful relations, cooperation, human rights, responsibility for wrongful acts and peaceful dispute settlement.

• State Sovereignty: The authority of a state to govern its territory and population without unlawful external interference. Sovereignty is important but not unlimited: states must comply with international obligations and may incur responsibility for internationally wrongful conduct.

• State Recognition: Acceptance by existing states that an entity possesses the characteristics of a state and can participate in international relations.

• Treaty: A formal written agreement between states or other authorised international subjects creating legal rights and duties. Treaties may be bilateral or multilateral and become binding through consent expressed by signature, ratification, acceptance, approval or accession.

• Customary International Law: Rules formed through sufficiently consistent and general state practice followed because states believe the practice is legally required. This belief is known as opinio juris.

• General Principles of Law: Fundamental principles recognised across legal systems, including good faith, fairness and responsibility for wrongdoing.

• Jus Cogens: Peremptory norms accepted by the international community as rules from which no derogation is permitted, including the prohibitions on genocide and slavery.

• Pacta Sunt Servanda: The principle that treaties in force must be performed by the parties in good faith. Internal law normally cannot justify failure to perform treaty obligations.

• Article 38(1) of the Statute of the International Court of Justice: Identifies the major sources used by the Court: international conventions, international custom, general principles of law, and judicial decisions and scholarly writings as subsidiary means.

• Jurisdiction: The legal authority of a state or international court to make decisions concerning persons, conduct, territory or disputes.

• State Responsibility: The legal consequence arising when a state commits an internationally wrongful act attributable to it and breaches an international obligation. Consequences may include cessation, assurances of non-repetition and reparation through restitution, compensation or satisfaction.

• Diplomatic Immunity: Protection given to accredited diplomats from certain legal processes in the receiving state, enabling them to perform diplomatic functions effectively.

• United Nations: An international organisation established in 1945 to maintain international peace and security, promote cooperation and support human rights.

• United Nations Charter: The founding treaty of the United Nations. It establishes the organisation’s purposes, principles, organs and rules concerning peace and security.

• Six Principal Organs of the United Nations: The General Assembly, Security Council, Economic and Social Council, Trusteeship Council, International Court of Justice and Secretariat.

• International Court of Justice: The principal judicial organ of the United Nations. It decides legal disputes between states and gives advisory opinions on legal questions. In contentious cases, states are the parties; individuals do not directly bring ordinary contentious cases before it.

• International Criminal Court: A permanent court prosecuting individuals for genocide, crimes against humanity, war crimes and the crime of aggression when jurisdictional conditions are satisfied. Its focus is individual criminal responsibility, unlike the International Court of Justice, which primarily settles disputes between states.

• Security Council: The United Nations organ primarily responsible for maintaining international peace and security through resolutions, sanctions and authorised action. It has 15 members: 5 permanent members and 10 non-permanent members elected for two-year terms. The permanent members are China, France, Russia, the United Kingdom and the United States.

• Security Council Voting and Veto: Substantive decisions generally require at least 9 affirmative votes, including the concurring votes of the permanent members. A negative vote by a permanent member is commonly called a veto.

• General Assembly: The representative and deliberative organ of the United Nations in which all member states participate and discuss global issues.

• International Humanitarian Law: Rules applying during armed conflict to protect civilians and persons no longer taking part in fighting, while limiting methods of warfare.

• International Human Rights Law: Rules protecting the dignity and fundamental rights of individuals and requiring states to respect, protect and fulfil those rights.

• Peaceful Settlement of Disputes: Resolution of international disagreements through negotiation, mediation, conciliation, arbitration, judicial settlement or other peaceful methods.

• International Legal Personality: The capacity to possess international rights and duties and to bring or receive claims under international law. States possess the fullest international legal personality, while international organisations derive their powers from their founding treaties.

• India’s Dualist Approach: In India, treaties may require domestic legislative action before becoming directly enforceable domestic law, depending on the subject and constitutional framework.

• Article 253 of the Constitution of India: Permits Parliament to make laws implementing treaties and international agreements.

• Article 51 of the Constitution of India: Directs the State to promote international peace and security, maintain just and honourable relations between nations, foster respect for international law and treaty obligations, and encourage settlement of international disputes by arbitration.

Causes and Consequences

• State consent creates treaty obligations. States become bound by treaties through methods such as signature, ratification, acceptance, approval or accession. Once a treaty is in force, pacta sunt servanda requires performance in good faith, and internal law normally cannot justify non-performance.

• State practice and legal belief create customary international law. A rule requires both sufficiently consistent and general state practice and opinio juris, meaning a belief that the practice is legally obligatory. Customary rules can therefore bind states beyond express treaty consent.

• Fundamental norms limit the freedom of states. Jus cogens norms, including the prohibitions on genocide and slavery, permit no derogation. This demonstrates that consent is central to international law but is not unlimited.

• The United Nations Charter restricts the use of force. Article 2(4) prohibits the threat or use of force against the territorial integrity or political independence of any state. Recognised exceptions include Security Council authorisation and self-defence under Article 51. The related principle of non-intervention requires states to avoid unlawful interference in matters within another state’s domestic jurisdiction.

• International institutions organise cooperation and enforcement. The United Nations, its General Assembly, Security Council, Economic and Social Council, Trusteeship Council, International Court of Justice and Secretariat create, interpret and implement international rules. However, international organisations possess only the powers granted by their founding instruments.

• The Security Council can respond to threats to peace and security. It may adopt resolutions, impose sanctions and authorise action. Its effectiveness is affected by the voting structure, particularly the veto held by China, France, Russia, the United Kingdom and the United States.

• Judicial institutions perform different functions. The International Court of Justice, established in 1945 and located at The Hague, primarily determines disputes between states and issues advisory opinions. The International Criminal Court prosecutes individuals for genocide, crimes against humanity, war crimes and the crime of aggression when jurisdictional conditions are satisfied.

• International law protects individuals as well as states. International Human Rights Law protects fundamental rights in peacetime and across broader situations, while International Humanitarian Law applies during armed conflict to protect civilians and persons no longer taking part in fighting and to limit methods of warfare.

• Wrongful conduct can produce state responsibility. Where conduct attributable to a state breaches an international obligation, the consequences may include cessation, assurances of non-repetition and reparation through restitution, compensation or satisfaction.

• Individuals may incur personal criminal responsibility. Political and military leaders may be held responsible for serious international crimes, and official position does not automatically provide immunity before relevant courts.

• Domestic institutions give international law practical effect. Because international law has no single world government or universal police force, compliance is encouraged through reciprocity, diplomacy, reputation, domestic implementation, sanctions, collective action and international or regional courts. In India, Article 253 enables legislative implementation of treaties, while Article 51 expresses constitutional support for international peace, international law and arbitration.

• Enforcement remains limited by sovereignty and political considerations. International law is legally significant without a central world authority because states accept obligations, create institutions and use legal rules to organise relations. Nevertheless, enforcement depends on jurisdiction, state participation, political will and available mechanisms.

What Gets Asked

• Compare treaties, customary international law, general principles of law and jus cogens as sources of international law, including the role of Article 38(1) of the Statute of the International Court of Justice.

• Explain the relationship between state sovereignty and international responsibility, including the significance of non-intervention, Article 2(4) of the United Nations Charter and self-defence under Article 51.

• Distinguish the functions and jurisdictions of the International Court of Justice and the International Criminal Court, particularly the difference between disputes involving states and criminal responsibility of individuals.

• Assess the structure and effectiveness of the United Nations, including the roles of the General Assembly and Security Council, the Security Council’s 15-member composition, the permanent members, the veto and the requirement of at least 9 affirmative votes for substantive decisions.

• Explain how treaties operate in India under its generally dualist approach, with reference to Article 253 and Article 51 of the Constitution of India.

• Evaluate why international law remains effective despite the absence of a single world government or universal police force, while considering the limits created by sovereignty, jurisdiction, political will and enforcement mechanisms.