; (2) have a diameter of 1.500 inches; and (3) contain at least 90 percent silver. (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. 4. Design of coins (a) Design requirements (1) In general The design of the coins minted under this Act shall bear— (A) an image of and the name of Christa McAuliffe on the obverse side; and (B) a design on the reverse side that depicts the legacy of Christa McAuliffe as a teacher. (2) Designation 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 2020 ; and (C) inscriptions of the words Liberty , In God We Trust , United States of America , and E Pluribus Unum . (b) Selection The design for the coins minted under this Act shall be— (1) selected by the Secretary, after consultation with the family of Christa McAuliffe, FIRST, and the Commission of Fine Arts; and (2) reviewed by the Citizens Coinage Advisory Committee. 5. Issuance of coins (a) Quality of coins Coins minted under this Act shall be issued in uncirculated and proof qualities. (b) Mint facility Only 1 facility of the United States Mint may be used to strike any particular quality of the coins minted under this Act. (c) Period for issuance The Secretary may issue coins under this Act only during the period beginning on January 1, 2020, and ending on December 31, 2020. 6. Sale of coins (a) Sale price The coins issued under this Act shall be sold by the Secretary at a price equal to the sum of— (1) the face value of the coins; (2) the surcharge provided under section 7(a) with respect to the coins; and (3) the cost of designing and issuing the coins, including— (A) labor; (B) materials; (C) dies; (D) use of machinery; (E) overhead expenses; (F) marketing