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thereof, lying seaward and outside the Continental Shelf 
of any nation; | 
(c) “Continental Shelf” refers to the seabed and 
subsoil of the submarine areas adjacent to the coast of 
any nation (including the coasts of islands), but outside 
the area of the territorial sea, to a depth of two hundred 
meters or, beyond that limit, to where the depth of the 
superjacent waters admits of the exploitation of the nat- 
ural resources of the said areas; 
(d) “block” means an area of the deep seabed hay- 
ing four boundary lines which are lines of longitude and 
latitude, the width of which may not be less than one- 
sixth the length, comprising not more than forty thou- 
sand square kilometers, and extending downward from 
the seabed to a depth of ten meters; 
(e) “hard mineral’ or “hard mineral resources” 
refers to nodules or accretions containing, but not limited 
to, iron, manganese, nickel, cobalt, and copper; 
(f) “development” means any operation of explora- 
tion and commercial recovery, other than prospecting, 
having the purpose of discovery, recovery, or delivery of 
hard minerals from the deep seabed ; 
(g) “prospecting” means any operation conducted 
for the purpose of making geophysical or geochemical 
measurements, bottom sampling, or comparable activities 
