average world price
(2) The Secretary may sell or use Government silver to mint coins, except silver transferred to stockpiles established under the Strategic and Critical Materials Stock Piling Act ( 50 U.S.C. 98 et seq.). The Secretary shall obtain the silver for the coins authorized under section 5112(e) of this title by purchase from stockpiles established under the Strategic and Critical Materials Stock Piling Act ( 50 U.S.C. 98 et seq.). At such time as the silver stockpile is depleted, the Secretary shall obtain silver as described in paragraph (1) to mint coins authorized under section 5112(e). If it is not economically feasible to obtain such silver, the Secretary may obtain silver for coins authorized under section 5112(e) from other available sources. The Secretary shall not pay more than the average world price for silver under any circumstances. As used in this paragraph, the term “average world price” means the price determined by a widely recognized commodity exchange at the time the silver is obtained by the Secretary. The Secretary shall sell silver under conditions the Secretary considers appropriate for at least $1.292929292 a fine troy ounce.