“ Section 5116 (a) of title 31, United States Code, is amended by adding at the end thereof the following: “ (3) The Secretary shall acquire gold for the coins issued under section 5112 (i) of this title by purchase of gold mined from natural deposits in the United States, or in a territory or possession of the United States, within one year after the month in which the ore from which it is derived was mined. The Secretary shall pay not more than the average world price for the gold. ”

“ A ten dollar gold coin that is 22.0 millimeters in diameter, weighs 8.483 grams, and contains one-fourth troy ounce of fine gold. “ (10) A five dollar gold coin that is 16.5 millimeters in diameter, weighs 3.393 grams, and contains one-tenth troy ounce of fine gold. ”