633 
granted leases which include areas beyond both the 200-metre isobath 
and 50 nautical miles from shore. 7/ 
A summary of this national practice appears below. Compilation: 
of this information is complicated by (1) the variety of ways in which as- 
sertions of offshore seabed jurisdiction have been made, (2) apparent in- 
consistencies between law and practice in several nations, and (3) the 
fact that some nations have asserted seabed jurisdiction by more than one 
method. This. summary is not limited to the practice of members of the 
United Nations. 
ANNEXED LISTS 
I. Parties to Geneva Convention on the Continental Shelf (39) 
II. States, not parties to the Convention, which have made declarations 
or enacted legislation concerning jurisdiction over the continental 
shelf (49) 
Adopted the Convention's definition (8) 
Adopted the exploitability criterion (3) 
Adopted other definitions (15) 
Adopted shelf concept in general legislation or proclamation, 
but no precise definition (23) 
OO be 
III. Other states and territories, not parties to the Convention, which 
have granted offshore concessions in apparent absence of general 
legislation (19) 
IV. States (whether or not parties to the Convention) which have granted 
offshore concessions for areas in which waters deeper than 200 metres 
have been provisionally identified (31) 
V.. Practice of the United States 
7/ These 14 are identified in Part IV of this Appendix. 
