259 



shall retain such rights of access to 

 rock, gravel and common varieties of 

 minerals in the subsurface conveyed by 

 Sealaska to the United States, as are 

 set forth in Section llio (b) of the 

 Alaska National Interest Lands 

 Conservation Act (Pub. L. no. 96-487, 94 

 Stat. 2465) . 



(6) The land exchange authorized 

 by this subsection may be modified or 

 amended, upon the written agreement of 

 the Secretary of Agriculture, Sealaska 

 Corporation, and the Greens Creek Joint 

 Venture, and appropriate notification in 

 writing to the appropriate committees of 

 the Congress without further action by 

 the Congress." 



SEC. 302. ADMINISTRATIVE EXCHANGE 

 AUTHORITY 



Section 1302 (h) of ANILCA is 

 amended by adding at the end thereof the 

 following: 



"Exchanges of subsurface interest 

 shall be presumed to be of equal value 

 if the numbers of acres of subsurface 

 exchanged are equal, absent market data 

 or similarly reliable evidence of the 

 economic value of the siibsurface 

 estate." 



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