; (B) have a diameter of 1.500 inches; and (C) contain at least 90 percent silver. (3) Half dollar clad coins Not more than 300,000 half dollar coins, which shall— (A) weigh 11.34 grams; (B) have a diameter of 1.205 inches; and (C) be minted to the specifications for half dollar coins, contained in section 5112(b) of title 31, United States Code. (b) Legal tender The coins minted under this Act shall be legal tender, as provided in section 5103 of title 31, United States Code. (c) Numismatic items For purposes of sections 5134 and 5136 of title 31, United States Code, all coins minted under this Act shall be considered to be numismatic items. (d) Mintage limit exception If the Secretary determines, based on independent market-based research conducted by the designated recipient organization identified in section 7(b), that the mintage levels described in subsections (a), (b), and (c) are not adequate to meet public demand, the Secretary may increase the mintage levels as the Secretary determines is necessary to meet public demand. 4. Designs of coins (a) Design requirements (1) In general The designs of the coins minted under this Act shall be emblematic of the sacrifices made by health care workers and first responders during the coronavirus pandemic. (2) Designations and inscriptions On each coin minted under this Act, there shall be— (A) a designation of the value of the coin; (B) an inscription of the year 2022 ; and (C) inscriptions of the words Liberty , In God We Trust , United States of America , and E Pluribus Unum . (b) Selection The designs for the coins minted under this Act shall— (1) honor the sacrifices made by health care professionals, first responders, scientists, and researchers during the coronavirus pandemic; (2) be selected by the Secretary, after consultation with the Secretary of Health and Human Services and the Commission of Fine Arts