Pub. L. 89-81, tit. I, sec. 104

Sec. 104. The Secretary shall purchase at a price of $1.25 per fine troy ounce any silver mined after the date of enactment, of this Act from natural deposits in the United States or any place subject to the jurisdiction thereof and tendered to a United States mint or assay office within one year after the month in which the ore from which it is derived was mined.