Sources of International Law

International law governs relations between sovereign states and international organisations. Article 38(1) of the Statute of the International Court of Justice is the authoritative statement on the sources of international law.

Primary Sources (Article 38, ICJ Statute)

Source Description
International treaties and conventions Formal written agreements between states — the most prominent source of international law and the only source available to states wanting to formally enter into legal relations
International custom General practice accepted as law — requires two elements: consistent state practice and opinio juris (acceptance of the practice as legally obligatory)
General principles of law Principles recognised by civilised nations — inserted as "gap fillers" by drafters of the PCIJ Statute for situations where treaties and customs were insufficient

Secondary (Subsidiary) Sources

Source Role
Judicial decisions Decisions of international courts and tribunals — subsidiary means for determination of rules of law
Teachings of publicists Writings of highly qualified scholars — used for interpretation and identification of rules

For Mains: Article 38(1) is not an exhaustive list. Resolutions of the UN General Assembly, acts of international organisations, and unilateral declarations by states can also create binding obligations. The ICJ has increasingly relied on customary international law alongside treaties.

International Court of Justice (ICJ)

Structure and Composition

Feature Detail
Established 1945, as the principal judicial organ of the United Nations
Seat Peace Palace, The Hague, Netherlands
Judges 15 judges elected for 9-year terms by the UN General Assembly and Security Council
Quorum 9 judges required; no two judges may be nationals of the same state
Ad hoc judges Parties to a dispute may appoint an ad hoc judge if no judge of their nationality sits on the bench
Official languages English and French

Jurisdiction

Type Scope
Contentious cases Only states (not individuals or organisations) can be parties; jurisdiction requires consent of both parties
Advisory opinions Given at the request of the UN General Assembly, Security Council, or other authorised UN organs and agencies
Compulsory jurisdiction States may accept compulsory jurisdiction under Article 36(2) — the "Optional Clause"; approximately 73 states have done so
Binding nature Judgments in contentious cases are binding on the parties; advisory opinions are non-binding but carry significant authority

India and the ICJ

Case Year Key Details
Corfu Channel (intervener) 1949 India participated as an intervener in early ICJ proceedings
Right of Passage over Indian Territory 1960 Portugal vs India — Court ruled India had the right to regulate passage to Portuguese enclaves in Goa
Trial of Pakistani Prisoners of War 1973 Pakistan filed against India over PoWs from the 1971 war; case removed from the list by mutual agreement
Aerial Incident of 10 August 1999 2000 Pakistan filed over the shooting down of its Atlantique aircraft; ICJ ruled it lacked jurisdiction as Pakistan had not accepted compulsory jurisdiction
Jadhav Case (India v. Pakistan) 2017–2019 India's most significant ICJ case in recent history

The Jadhav Case (India v. Pakistan) — 2019

Aspect Detail
Background Kulbhushan Sudhir Jadhav, an Indian national, was arrested by Pakistan in 2016 and sentenced to death by a Pakistani military court in April 2017 on charges of espionage and terrorism
India's application Filed on 8 May 2017, alleging violations of the Vienna Convention on Consular Relations (1963) — Pakistan had denied consular access to Jadhav
Provisional measures On 18 May 2017, the ICJ unanimously ordered Pakistan not to execute Jadhav pending a final decision
Hearings Public hearings on the merits held from 18 to 21 February 2019
Judgment date 17 July 2019
Key finding Pakistan had breached its obligation under Article 36(1)(b) of the Vienna Convention by failing to inform Jadhav of his right to consular access "without delay"
Remedy ordered Pakistan must provide effective review and reconsideration of the conviction and sentence, ensuring full weight is given to the effect of the Vienna Convention violation
Pakistan's defence rejected The Court held the Vienna Convention was applicable "regardless of the allegations that Mr. Jadhav was engaged in espionage activities"
Vote 15-1 on the question of consular access violation

For Prelims: The ICJ's judgment in the Jadhav case (2019) was based on the Vienna Convention on Consular Relations, 1963 — not the Vienna Convention on Diplomatic Relations, 1961. These are two separate treaties.

International Criminal Court (ICC)

Structure and Key Facts

Feature Detail
Established by Rome Statute, adopted on 17 July 1998; entered into force on 1 July 2002
Seat The Hague, Netherlands
States Parties 124 countries as of 2025 — 33 African, 19 Asia-Pacific, 20 Eastern European, 28 Latin American and Caribbean, 25 Western European and other states
Jurisdiction Genocide, crimes against humanity, war crimes, and the crime of aggression
Principle Complementarity — the ICC acts only when national courts are unwilling or unable to genuinely investigate or prosecute
Prosecutor Karim A.A. Khan (since 2021)

India's Position on the ICC

Aspect India's Stance
Signatory status India is NOT a party to the Rome Statute — it abstained from the vote at the Rome Conference in 1998
Other non-members USA, China, Russia, and Israel are also not parties
Key concerns Potential interference with sovereignty; broad powers of the Prosecutor to initiate investigations proprio motu; concerns about the definition of crimes being too wide; no adequate safeguards against politically motivated prosecutions
Cooperation India cooperates with international tribunals on a case-by-case basis

For Mains: India's non-membership of the ICC does not mean India opposes accountability for international crimes. India has supported ad hoc tribunals (ICTY for Yugoslavia, ICTR for Rwanda) and consistently advocates for rule-based international order. India's objection is to the specific institutional design of the ICC, not to the principle of international criminal justice.

UNCLOS — United Nations Convention on the Law of the Sea

Overview

Feature Detail
Adopted 10 December 1982 at Montego Bay, Jamaica
Entered into force 16 November 1994
States Parties 169 states and the European Union as of 2025
Often called "Constitution of the Oceans"
India's ratification India signed UNCLOS in 1982 and ratified it on 29 June 1995

Maritime Zones Under UNCLOS

Zone Extent from Baseline Key Rights
Internal Waters Landward of the baseline Full sovereignty — equivalent to territory on land
Territorial Sea Up to 12 nautical miles (nm) Full sovereignty, subject to right of innocent passage for foreign vessels
Contiguous Zone 12–24 nm Enforcement jurisdiction for customs, fiscal, immigration, and sanitary laws
Exclusive Economic Zone (EEZ) Up to 200 nm Sovereign rights for exploration, exploitation, conservation, and management of natural resources (living and non-living)
Continental Shelf Up to 200 nm (extendable to 350 nm in certain conditions) Sovereign rights over the seabed and subsoil for resource exploitation
High Seas Beyond 200 nm EEZ Freedom of navigation, overflight, fishing, scientific research — common heritage of mankind
The Area Seabed beyond national jurisdiction International Seabed Authority (ISA) manages mineral resources as "common heritage of mankind"

India and UNCLOS

Aspect Detail
India's EEZ Approximately 2.37 million sq km — India has the 18th largest EEZ in the world
Coastline 7,516 km (including island territories of Andaman & Nicobar and Lakshadweep)
Continental shelf claim India submitted a claim to the Commission on the Limits of the Continental Shelf (CLCS) in 2009 for an extended continental shelf beyond 200 nm
Deep sea mining India holds exploration rights for polymetallic nodules in the Central Indian Ocean Basin (allotted by ISA in 2002)
Maritime disputes India resolved its maritime boundary with Bangladesh through the Permanent Court of Arbitration (2014) — "Bay of Bengal Maritime Boundary Arbitration"
Legislation Maritime Zones of India Act, 1976 (predates UNCLOS but largely consistent); Territorial Waters, Continental Shelf, EEZ and Other Maritime Zones Act

High Seas Treaty (BBNJ Agreement)

The Agreement on Biodiversity Beyond National Jurisdiction (BBNJ Agreement), also called the High Seas Treaty, was adopted in June 2023. India signed the treaty and is working towards formal ratification, which requires amendments to the Biological Diversity Act.

For Prelims: UNCLOS defines six maritime zones. India's EEZ extends to 200 nm and covers approximately 2.37 million sq km. The International Seabed Authority (ISA), headquartered in Kingston, Jamaica, regulates deep sea mining in "The Area" beyond national jurisdiction.

Geneva Conventions and International Humanitarian Law (IHL)

The Four Geneva Conventions of 1949

Convention Protects
First Geneva Convention Wounded and sick soldiers on land (amelioration of the condition of the wounded and sick in armed forces in the field)
Second Geneva Convention Wounded, sick, and shipwrecked members of armed forces at sea
Third Geneva Convention Prisoners of war — defines their rights and standards for treatment
Fourth Geneva Convention Civilian persons in time of war — protection of civilians in and around a war zone

Additional Protocols

Protocol Year Subject
Additional Protocol I 1977 Protection of victims of international armed conflicts — strengthens the Fourth Geneva Convention
Additional Protocol II 1977 Protection of victims of non-international (internal) armed conflicts — expands on Common Article 3
Additional Protocol III 2005 Adoption of an additional distinctive emblem — the Red Crystal (alongside the Red Cross and Red Crescent)

Key Principles of IHL

Principle Meaning
Distinction Parties must distinguish between combatants and civilians; attacks may only be directed at military objectives
Proportionality Attacks must not cause civilian harm excessive in relation to the military advantage anticipated
Military necessity Force may only be used to the extent necessary to achieve a legitimate military purpose
Humanity Suffering must be minimised; superfluous injury and unnecessary suffering are prohibited
Common Article 3 Minimum protections applicable in all armed conflicts (international and non-international) — prohibits violence to life, torture, hostage-taking, and outrages upon personal dignity

Ratification Status

The four Geneva Conventions of 1949 are among the most universally ratified treaties in history — 196 states are parties, covering virtually every country in the world. India is a party to all four Geneva Conventions and to Additional Protocol I. India has not ratified Additional Protocol II.

For Mains: Common Article 3 is sometimes called a "mini-convention" within the Geneva Conventions because it applies to all armed conflicts, including internal conflicts. It establishes the absolute minimum standards of humanitarian treatment. The ICRC (International Committee of the Red Cross) is the guardian of IHL.

Extradition Law — Principles and India's Practice

Key Principles of Extradition

Principle Description
Dual criminality The alleged offence must be a crime in both the requesting and requested state
Specialty The extradited person can only be tried for the offence for which extradition was granted
Non-extradition of political offenders Political offences are generally excluded from extradition — though the definition of "political offence" varies
Rule of non-refoulement A person cannot be extradited to a state where they face a real risk of torture or inhuman treatment
Double jeopardy Extradition may be refused if the person has already been tried for the same offence

India's Extradition Framework

Feature Detail
Governing law Extradition Act, 1962
Extradition treaties India has extradition treaties with approximately 48 countries and extradition arrangements with 12 countries
Key treaty partners UK, USA, Canada, UAE, France, Spain, Bangladesh, and others
Nodal ministry Ministry of External Affairs (Consular, Passport & Visa Division) handles incoming and outgoing extradition requests
CBI role Central Bureau of Investigation (CBI) and Interpol coordinate operational aspects

High-Profile Extradition Cases

Case Status
Vijay Mallya Former Kingfisher Airlines chairman; accused of defaulting on approximately Rs 9,000 crore in bank loans; fled to the UK in 2016; UK courts approved extradition in 2020 but actual transfer delayed due to legal challenges over prison conditions
Nirav Modi Diamond merchant accused in the nearly USD 2 billion Punjab National Bank fraud; arrested in London in 2019; UK courts approved extradition in 2021; transfer delayed due to a "confidential impediment" cited by UK courts in 2025
Abu Salem Extradited from Portugal to India in 2005 under the condition that he would not be sentenced to death or imprisoned for more than 25 years — extradition conditions became a significant precedent
Ottavio Quattrocchi Wanted in the Bofors scandal; India sought extradition from Argentina and Malaysia but was unsuccessful
Kim Davy (Niels Holck) Purulia arms drop case (1995); India sought extradition from Denmark but the Danish High Court denied it in 2011

For Mains: India has faced persistent challenges in extraditing economic offenders from the UK. Prison conditions in India (particularly in Tihar Jail) have been cited as a reason for delays. In 2025, a CPS (Crown Prosecution Service) team from the UK visited Tihar Jail to assess conditions — a key step in addressing concerns. India enacted the Fugitive Economic Offenders Act, 2018 to allow confiscation of assets of fugitives who flee India to avoid prosecution.

Space Law

Major Space Law Treaties

Treaty Year Key Provisions India's Status
Outer Space Treaty 1967 Foundational treaty — space is free for exploration by all states; no sovereignty claims; no nuclear weapons in space; states responsible for national space activities India is a party (ratified)
Rescue Agreement 1968 Return of astronauts and space objects to launching state India is a party
Liability Convention 1972 Launching state is liable for damage caused by its space objects on Earth (absolute liability) and in space (fault-based liability) India is a party
Registration Convention 1975 States must register space objects with the UN; maintains a register of objects launched into space India is a party
Moon Agreement 1979 Declares the Moon and its resources as "common heritage of mankind"; restricts exploitation India signed but has NOT ratified — the treaty has very few parties and no major spacefaring nation has ratified it

Key Principles of the Outer Space Treaty (1967)

Principle Detail
Non-appropriation Outer space, including the Moon and celestial bodies, is not subject to national appropriation by sovereignty claim, use, occupation, or any other means (Article II)
Freedom of exploration Space shall be free for exploration and use by all states without discrimination (Article I)
Peaceful purposes States shall not place nuclear weapons or WMDs in orbit or on celestial bodies (Article IV)
State responsibility States are internationally responsible for national space activities, whether by governmental or non-governmental entities (Article VI)
Liability Launching state is liable for damage caused by its space objects (Article VII)
Astronauts as envoys Astronauts are regarded as "envoys of mankind" and must be assisted in case of accident or emergency (Article V)

Artemis Accords

Feature Detail
Initiated by United States (NASA), 2020
Nature Non-binding political commitment grounded in the Outer Space Treaty
Signatories 61 countries as of January 2026 (including India)
Key principles Peaceful purposes, transparency, interoperability, registration, release of scientific data, preservation of heritage, space resources, deconfliction of activities, orbital debris
India's signing India signed the Artemis Accords during PM Modi's visit to the US in June 2023
Controversy Some nations (China, Russia) view the Accords as US-led effort to shape space governance outside the UN framework

India's Space Law

India enacted the Indian Space Activities Bill (under development as of 2026) to regulate private sector participation in space activities. ISRO's commercial arm, NewSpace India Limited (NSIL), handles commercial launches and technology transfer. India's anti-satellite (ASAT) test in 2019 ("Mission Shakti") raised questions about space debris and the militarisation of space.

For Prelims: The Outer Space Treaty (1967) has 118 parties. India has signed but not ratified the Moon Agreement (1979). India signed the Artemis Accords in 2023. The treaty explicitly prohibits nuclear weapons in space but does not ban all military activities.

Antarctica Treaty System

Antarctic Treaty (1959)

Feature Detail
Signed 1 December 1959, Washington D.C.
Entered into force 23 June 1961
Original signatories 12 countries (Argentina, Australia, Belgium, Chile, France, Japan, New Zealand, Norway, South Africa, USSR, UK, USA)
Current parties 56 states (29 Consultative Parties with decision-making power, 27 Non-Consultative Parties)
Key provisions Antarctica used exclusively for peaceful purposes; freedom of scientific research; ban on military activities, nuclear explosions, and radioactive waste disposal

India and Antarctica

Milestone Year Detail
First expedition 1981–82 India's first Antarctic expedition launched under the Indian Antarctic Programme
Antarctic Treaty membership 1983 India became a Consultative Party, gaining decision-making power
Dakshin Gangotri 1983 India's first permanent research station, built on the ice shelf in Dronning Maud Land; decommissioned in 1990 after getting buried under snow
Maitri 1989 India's second station, located in the Schirmacher Oasis; currently operational
Bharati 2012 India's third station, operational since 18 March 2012; located in the Larsemann Hills
Maitri II Planned by 2029 New next-generation research station to replace the ageing Maitri station

Protocol on Environmental Protection (Madrid Protocol, 1991)

The Protocol designates Antarctica as a "natural reserve devoted to peace and science" and bans mining and mineral resource activities (except for scientific research). The mining ban is subject to review after 2048, which has raised concerns about future resource exploitation pressures.

For Prelims: India has two active research stations in Antarctica — Maitri (1989) and Bharati (2012). Dakshin Gangotri (1983) was decommissioned. India became a Consultative Party to the Antarctic Treaty in 1983. A new Maitri II station is planned for completion by 2029.

Refugee Law and India's Position

International Framework

Instrument Year Key Provision
1951 Refugee Convention 1951 Defines "refugee" — a person who has a well-founded fear of persecution based on race, religion, nationality, membership of a particular social group, or political opinion
1967 Protocol 1967 Removed geographic and temporal limitations of the 1951 Convention — made it universal
Principle of non-refoulement Core principle A refugee must not be returned to a country where they face serious threats to their life or freedom

India's Position

Aspect Detail
Signatory status India is NOT a signatory to either the 1951 Refugee Convention or its 1967 Protocol
Domestic law India has no dedicated refugee legislation — refugees are treated as "foreigners" under the Foreigners Act, 1946
Administrative approach India handles refugees on an ad hoc, group-specific basis — Tibetans, Sri Lankan Tamils, and Bangladeshis have received varying levels of protection
UNHCR in India UNHCR operates in India and issues refugee cards, but these have no legal standing under Indian law
Hosting record Despite no legal framework, India hosts large refugee populations — Tibetans (since 1959), Sri Lankan Tamils, Chakma and Hajong refugees, Rohingya, and Afghans

Citizenship Amendment Act (CAA), 2019

Feature Detail
Enacted 12 December 2019 (rules notified in March 2024)
Provision Provides accelerated pathway to Indian citizenship for persecuted religious minorities (Hindus, Sikhs, Buddhists, Jains, Parsis, Christians) from Afghanistan, Bangladesh, and Pakistan who entered India on or before 31 December 2014
Excludes Muslims from these three countries; does not cover refugees from other countries (e.g., Myanmar, Sri Lanka)
Controversy Critics argue it discriminates on religious grounds; supporters say it targets specifically persecuted minorities in Muslim-majority countries
Important note The CAA deliberately avoids the term "refugee" because India is not a signatory to the 1951 Convention and seeks to avoid associated obligations

For Mains: India's approach to refugees is characterised by pragmatism rather than a legal framework. The absence of a domestic refugee law gives the government flexibility but also leaves refugees vulnerable to arbitrary decisions. The National Human Rights Commission has recommended that India enact a comprehensive national refugee law.

Diplomatic Immunity — Vienna Conventions

Vienna Convention on Diplomatic Relations (1961)

Feature Detail
Adopted 18 April 1961
Entered into force 24 April 1964
Parties 193 states — virtually universal ratification
Purpose Codifies the longstanding custom of diplomatic immunity and defines a framework for diplomatic relations between sovereign states

Levels of Diplomatic Immunity

Category Immunity Level
Diplomatic agents (ambassadors, envoys) Full immunity from criminal, civil, and administrative jurisdiction of the host state (Article 31) — can only be waived by the sending state
Family members Same protections as the diplomatic agent (Article 37)
Administrative and technical staff Immunity for acts performed in official capacity; criminal immunity is full but civil immunity is limited
Service staff Immunity only for acts performed in the course of duties
Diplomatic premises Inviolable — host state authorities may not enter without permission (Article 22); diplomatic bag cannot be opened or detained (Article 27)

Vienna Convention on Consular Relations (1963)

Feature Detail
Adopted 24 April 1963
Key distinction Consular officers have "functional immunity" (immunity for acts in exercise of consular functions) — not the broader "personal immunity" of diplomats
Article 36 Right of consular access — if a national of one state is detained in another, the consular post must be informed "without delay" (this was the basis of the Jadhav case)

For Prelims: The Vienna Convention on Diplomatic Relations (1961) and the Vienna Convention on Consular Relations (1963) are two separate treaties. Diplomatic immunity is broader (full personal immunity) while consular immunity is narrower (functional immunity only). Article 36 of the Consular Convention — the right of consular access — was central to the ICJ's Jadhav case judgment.

Key Terms for Quick Revision

Term Meaning
Jus cogens Peremptory norms of international law from which no derogation is permitted (e.g., prohibition of genocide, slavery, torture)
Opinio juris Belief that a practice is legally obligatory — required element for custom to become customary international law
Pacta sunt servanda "Agreements must be kept" — the fundamental principle that treaties are binding on parties
Ratification Formal act by which a state expresses its consent to be bound by a treaty (distinct from signing)
Reservation A unilateral statement by a state at the time of ratification, modifying or excluding certain treaty provisions
Non-refoulement Prohibition on returning a person to a country where they face persecution — cornerstone of refugee law
Complementarity ICC principle — the Court acts only when national courts are unwilling or unable to prosecute
Innocent passage Right of ships to pass through the territorial sea without prior notification, provided the passage is not prejudicial to peace, order, or security
EEZ Exclusive Economic Zone — up to 200 nm from baseline, sovereign rights over resources but freedom of navigation for other states
Common heritage of mankind Principle that certain areas (deep seabed, potentially space) belong to all humanity and cannot be appropriated by any state

Exam Strategy

For Mains Answer Writing: International law questions often appear in GS-II Paper 2 as part of "bilateral, regional and global groupings." When writing answers, always cite specific treaty provisions (e.g., "Article 36 of the Vienna Convention on Consular Relations" rather than just "Vienna Convention"). Use the Jadhav case, UNCLOS disputes, and ICC debates as contemporary examples. Structure answers around India's principled positions — sovereignty, non-interference, and multilateral frameworks through the UN.

For Prelims: Focus on numerical facts — maritime zone distances (12 nm territorial sea, 24 nm contiguous zone, 200 nm EEZ), number of ICC member states (124), number of Geneva Conventions (4 + 3 Additional Protocols), and India's ratification status for major treaties. The distinction between the two Vienna Conventions (1961 for diplomatic relations, 1963 for consular relations) is frequently tested.