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sary to its execution. No person subject to the jurisdiction 
of the United States shall directly or indirectly develop any 
portion of the deep seabed except as authorized by license 
issued pursuant to this Act or by a reciprocating state. 
Nothing in this Act or any regulation prescribed thereunder 
shall preclude, or impose any restriction upon, scientific 
research or prospecting by any person of any portion of the 
deep seabed not subject to an outstanding license issued 
under this Act or by any reciprocating state, or shall re- 
quire any applicant for a license or any licensee to divulge 
any information which could prejudice its commercial 
position. 
EXCLUSIVE LICENSES; LIMITATIONS AND CONDITIONS 
Sec. 4. (a) The Secretary shall issue licenses pursuant 
to section 5, recognizing rights, which shall be exclusive as 
against all persons subject to the jurisdiction of the United 
States or of any reciprocating state, to develop the block 
designated in such license, as follows: (i) as to each surface 
block, the rights shall extend to manganese-oxide nodules 
and all other hard minerals at the surface of the deep seabed 
or iocated vertically below to a depth not exceeding ten 
meters; (ii) as to each subsurface block, the rights shall 
extend to all hard minerals located more than ten meters 
beneath the surface of the deep seabed. 
