Pub. L. 102-281, tit. I, sec. 106
ISSUANCE OF THE COINS.
SEC. 106. ISSUANCE OF THE COINS. (a) Period for Issuance.—The coins authorized under this title shall be available for issue not later than May 1, 1992, but shall be issued only during the 1-year period beginning on such date. (b) Proof and uncirculated Coins.—The coins authorized under this title shall be issued in uncirculated and proof qualities. Not more than one facility of the Bureau of the Mint may be used to strike any particular combination of denomination and quality.