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and may, from time to time, revise criteria for evaluating the 
potential impact on the marine environment of deep seabed 
hard mineral mining operations, 
“MINIMUM ANNUAL BXPENDITURES 
“Suc. 8. In connection with the development of hard 
mineral resources from each licensed block, the licensee shall 
make or cause to be made minimum expenditures in the 
following amounts per block until commercial recovery from 
such block is first initiated: 
"Year Amount per year 
a a a ee ee Oe 
Gene Se ee oe ee ed, 000, 000 
The minimum annual expenditures required under this sec- 
tion shall consist of expenditures for operations, facilities, 
and equipment as required or utilized at the site for which 
the development license is issued. Such expenditures in any 
year in excess of the required minimum may be credited 
to requirements for later years. 
“AUTHORIZATION TO BEGIN COMMBEROIAL RECOVERY 
“Sro, 9. Upon completion of its exploration activities at 
any licensed block, the licensee shall so notify the Secretary 
and request from the Secretary an authorization to begin 
commercial recovery. Upon receipt of such request, the 
Secretary shall grant such authorization: Provided, That the 
licensee is in compliance with all conditions of the license 
and has furnished the Secretary with copies of all raw 
