UNCLOS and India

The United Nations Convention on the Law of the Sea (UNCLOS) is the comprehensive treaty adopted at Montego Bay, Jamaica, on 10 December 1982, which entered into force on 16 November 1994 after the deposit of the sixtieth instrument of ratification. It codifies the legal regime governing all uses of the world's oceans, replacing the patchwork of four 1958 Geneva Conventions and resolving the contested breadth of the territorial sea that the First and Second UN Conferences on the Law of the Sea had failed to settle. India participated actively in the Third Conference (1973–1982), aligning with the Group of 77 on the common-heritage-of-mankind principle for the deep seabed. India signed the Convention on 10 December 1982 and deposited its instrument of ratification on 29 June 1995, becoming bound by the full treaty regime as supplemented by the 1994 Agreement relating to the Implementation of Part XI.

Domestically, India anticipated the Convention through the Territorial Waters, Continental Shelf, Exclusive Economic Zone and Other Maritime Zones Act, 1976, enacted under Article 297 of the Constitution, which vests all minerals and resources of the territorial waters, continental shelf and exclusive economic zone in the Union. The Act fixes India's territorial sea at 12 nautical miles measured from the baseline, a contiguous zone extending to 24 nautical miles, and an Exclusive Economic Zone (EEZ) reaching 200 nautical miles, mirroring the limits UNCLOS would later confirm in Articles 3, 33 and 57. Within the territorial sea India exercises full sovereignty subject to the right of innocent passage; within the EEZ it holds sovereign rights over living and non-living resources, jurisdiction over artificial islands, marine scientific research and the protection of the marine environment, as set out in Article 56.

Beyond 200 nautical miles, UNCLOS Article 76 permits a coastal state to claim an extended continental shelf where the natural prolongation of its land territory extends further, subject to scrutiny by the Commission on the Limits of the Continental Shelf (CLCS). India lodged its submission to the CLCS in May 2009, seeking to establish the outer limits of its shelf in the Arabian Sea and the Bay of Bengal beyond the 200-nautical-mile EEZ. The Convention also confers on India rights in the high seas (Part VII), transit through international straits, and access to deep-seabed mining under Part XI; India was designated a Pioneer Investor in 1987 and holds exploration contracts with the International Seabed Authority for polymetallic nodules in the Central Indian Ocean Basin and polymetallic sulphides along the Indian Ocean ridges.

Several contemporary instances illustrate the Convention's operation for New Delhi. In the Bay of Bengal maritime boundary arbitration between Bangladesh and India, an Annex VII tribunal constituted under UNCLOS delivered its award on 7 July 2014, delimiting the territorial sea, EEZ and continental shelf and awarding Bangladesh a substantial share of the disputed area, including a grey zone of overlapping jurisdiction—an outcome India accepted, demonstrating its commitment to compulsory dispute settlement. The 2012 Enrica Lexie incident, in which Italian marines aboard an oil tanker shot two Indian fishermen, was referred to an Annex VII tribunal that ruled in 2020 on the question of immunity and concurrent jurisdiction. India's Ministry of External Affairs has repeatedly invoked UNCLOS to reject China's nine-dash-line claims in the South China Sea and to endorse the 2016 South China Sea arbitral award.

UNCLOS must be distinguished from adjacent frameworks. It is broader than the International Maritime Organization (IMO) conventions such as SOLAS or MARPOL, which regulate shipping safety and pollution but not sovereignty or jurisdiction. It differs from the principle of freedom of navigation, which the United States asserts through unilateral Freedom of Navigation Operations (FONOPs); India regards the EEZ as a zone where prior consent is required for foreign military exercises, a position at variance with the US reading of Articles 58 and 87. The Convention is also separate from customary international law of the sea, though India, like all states, treats much of UNCLOS as reflecting custom binding even on non-parties such as the United States.

Controversies persist. India entered a declaration on ratification reserving its position that military activities and exercises by other states in its EEZ and on its continental shelf require notification or consent—an interpretation Washington formally protested. The treatment of the grey zone in the Bay of Bengal award, where one state holds water-column rights and another holds seabed rights, remains a model and a complication for resource management. India's pending CLCS submission overlaps in part with claims by neighbouring states, and the unresolved status of certain baselines and historic bays continues to generate technical debate. The negotiation of the 2023 BBNJ Agreement on biodiversity beyond national jurisdiction, which India signed, extends the UNCLOS framework into the high-seas commons.

For the working practitioner—whether a Civil Services aspirant addressing GS Paper II, an MEA desk officer, or a maritime-security analyst—UNCLOS is the indispensable reference for every Indian Ocean question, from anti-piracy operations off the Horn of Africa to seabed mining and the Indo-Pacific balance. It anchors India's claim to leadership in the global commons, underpins its rejection of expansive Chinese maritime assertions, and frames its bilateral delimitations with Pakistan, Sri Lanka, the Maldives and Indonesia. Mastery of the Convention's articles and India's domestic implementing statute is foundational to understanding the legal architecture of New Delhi's blue-water ambitions.