429. Under article 76, paragraph 1, of the Convention, the continental shelf
of a coastal State can extend either to the outer edge of the continental
margin or to a distance of 200 nm, depending on where the outer edge is
situated. While the term “natural prolongation” is mentioned in this paragraph,
it is clear from its language that the notion of “the outer edge of the continental
margin” is an essential element in determining the extent of the continental
shelf.