UNCLOS is often called the 'Constitution for the Oceans.' Discuss its core institutional architecture and examine why it retains authority even over non-signatory states.

Adopted at Montego Bay on 10 December 1982 and in force since 16 November 1994, UNCLOS compresses 320 articles and nine annexes into a single framework governing all uses of ocean space [1]. It is "constitutional" because it simultaneously creates permanent institutions and codifies customary rules that reach beyond its own membership.

Core institutional architecture

• Zonal framework: the 12-nautical-mile territorial sea, the 200-nm exclusive economic zone and the continental shelf, each with defined rights and duties, form the substantive base on which the institutions rest [1].
• International Seabed Authority (Kingston): administers the deep seabed "Area" as the common heritage of mankind under Part XI, recalibrated by the 1994 Implementation Agreement to win wider ratification [3].
• Commission on the Limits of the Continental Shelf: an expert body that vets coastal-State claims beyond 200 nm, converting political assertion into technical verification [1].
• ITLOS (Hamburg) plus Annex VII arbitration: compulsory dispute settlement with real bite — India and Bangladesh both accepted the 2014 Annex VII award delimiting their Bay of Bengal boundary [2][4].

Why it binds non-signatories

• Codification, not creation: innocent passage, high-seas freedoms and transit passage through international straits largely restate pre-existing custom, binding all States irrespective of ratification.
• Residual anchoring: the Preamble affirms that matters unregulated by the Convention remain governed by general international law, tying UNCLOS to the wider customary order [6].
• Near-universal participation: consistent State practice and opinio juris have hardened its core rules; the United States, though absent from the list of parties, still frames its navigational claims in UNCLOS vocabulary [5].
• Chokepoint practice: disputes over straits such as Hormuz are argued in UNCLOS terms even against non-parties.

UNCLOS therefore operates on two levels — an institutional order for seabed, shelf and adjudication, and the authoritative statement of customary maritime law. Its continued authority rests on members preferring ITLOS to coercion, advancing SDG-14 and India's vision of a rules-based, secure Indian Ocean.