; or (2) April 15, 2021. (b) Application of Federal Advisory Committee Act (1) In general Except as provided in paragraph (2), the provisions of the Federal Advisory Committee Act (5 U.S.C. App.) shall apply to the activities of the Centennial Commission under this Act. (2) Exception Section 14(a)(2) of such Act (5 U.S.C. App.) shall not apply to the Centennial Commission. 8. Authorization of appropriations (a) In General There are authorized to be appropriated to carry out this Act such sums as may be necessary for the period of fiscal years 2017 through 2021. (b) Amounts available Amounts appropriated in accordance with this section for any fiscal year shall remain available until the termination of the Centennial Commission.