; (ii) the Fossil Forest Research Natural Area; or (iii) a special management area or area of critical environmental concern identified in a land use plan developed under section 202 of the Federal Land Policy and Management Act of 1976 ( 43 U.S.C. 1712 ) that is in effect on the date of enactment of this Act. (C) Any land subject to a lease or contract under the Mineral Leasing Act ( 30 U.S.C. 181 et seq.) or the Act of July 31, 1947 (commonly known as the Materials Act of 1947 ) ( 30 U.S.C. 601 et seq.) as of the date of the selection. (4) Deadline Not later than 7 years after the date of enactment of this Act, the Navajo Nation shall make all selections under paragraph (1). (5) Withdrawal Any land selected by the Navajo Nation under paragraph (1) shall be withdrawn from disposal, leasing, and development until the date on which the selected land is placed into trust for the Navajo Nation. (c) Equal value (1) In general Notwithstanding the acreage limitation in the second proviso of section 11(c) of Public Law 93–531 (commonly known as the Navajo-Hopi Land Settlement Act of 1974 ) ( 25 U.S.C. 640d–10(c) ) and subject to subsection (b)(2), the value of the land selected under subsection (b)(1) and the land subject to selections cancellation under subsection (a) shall be equal, based on appraisals conducted under paragraph (2). (2) Appraisals (A) In general The value of the land selected under subsection (b)(1) and the land subject to selections cancelled under subsection (a) shall be determined by appraisals conducted in accordance with— (i) the Uniform Appraisal Standards for Federal Land Acquisitions