; 43 U.S.C. 869 et seq.). (b) Reversionary clause required A conveyance under subsection (a) shall include a reversionary clause to ensure that management of the land described in that subsection shall revert to the Secretary if the land is no longer being managed as a State park in accordance with subsection (a). 402. Jurassic National Monument (a) Establishment purposes To conserve, interpret, and enhance for the benefit of present and future generations the paleontological, scientific, educational, and recreational resources of the area and subject to valid existing rights, there is established in the State the Jurassic National Monument (referred to in this section as the Monument ), consisting of approximately 850 acres of Federal land administered by the Bureau of Land Management in the County and generally depicted as Proposed Jurassic National Monument on the Map. (b) Map and legal description (1) In general Not later than 2 years after the date of enactment of this Act, the Secretary shall file with the Committee on Energy and Natural Resources of the Senate and the Committee on Natural Resources of the House of Representatives a map and legal description of the Monument. (2) Effect The map and legal description filed under paragraph (1) shall have the same force and effect as if included in this section, except that the Secretary may correct clerical and typographical errors in the map and legal description, subject to the requirement that, before making the proposed corrections, the Secretary shall submit to the State and any affected county the proposed corrections. (3) Public availability A copy of the map and legal description filed under paragraph (1) shall be on file and available for public inspection in the appropriate offices of the Bureau of Land Management. (c) Withdrawal Subject to valid existing rights, any Federal land within the boundaries of the Monument and any land or interest in land that is acquired by the United States for inclusion in the Monument after the date of enactment of