The CONTINENTAL SHELF, under Article 76 UNCLOS 1982, extends to:

Question

Accepted Answer

D. the outer edge of the continental margin, OR 200 nautical miles from baselines where the outer edge does not extend to that distance — but may extend up to 350 nautical miles in certain conditions

1. Article 76(1) UNCLOS 1982: 'The continental shelf of a coastal State comprises the seabed and subsoil of the submarine areas that extend beyond its territorial sea throughout the natural prolongation of its land territory to the outer edge of the continental margin, or to a distance of 200 nautical miles from the baselines from which the breadth of the territorial sea is measured where the outer edge of the continental margin does not extend up to that distance.'
2. Article 76(5)-(6) prescribe an outer limit of EITHER (a) 350 nautical miles from baselines OR (b) 100 nautical miles from the 2,500-metre isobath — whichever is greater.
3. The Commission on the Limits of the Continental Shelf (CLCS) reviews extended continental shelf claims.
4. Hence option B is correct.
_Source: UN Charter 1945 / Vienna Convention on Law of Treaties 1969 / Geneva Conventions 1949 / ICJ Statute / UDHR ICCPR ICESCR — UN Convention on the Law of the Sea 1982, Article 76_

Answer

only 50 nautical miles from baselines, with no extension permissible (cf. UN Convention on the Law of the Sea 1982, Article 76) (cf. UN Convention on the Law of the Sea 1982, Article 76)

Answer

the same distance as the territorial sea — 12 nautical miles only (cf. UN Convention on the Law of the Sea 1982, Article 76) (cf. UN Convention on the Law of the Sea 1982, Article 76)

Answer

1000 nautical miles in every case for all coastal States (cf. UN Convention on the Law of the Sea 1982, Article 76) (cf. UN Convention on the Law of the Sea 1982, Article 76)