; and (B) shall not be disposed of by the County. (2) Reversion If the Federal land conveyed under subsection (b) is used in a manner inconsistent with paragraph (1), the Federal land shall, at the discretion of the Secretary concerned, revert to the United States. (e) Acquisition of Federal reversionary interest (1) In general After the date of conveyance of Federal land under subsection (b) that is obtained for public purposes in accordance with the Act of June 14, 1926 (commonly known as the Recreation and Public Purposes Act ) ( 43 U.S.C. 869 et seq.), the County may submit to the Secretary concerned a request to acquire the Federal reversionary interest in all or any portion of the Federal land. (2) Appraisal (A) In general Not later than 180 days after the date of receipt of a request under paragraph (1), the Secretary concerned shall complete an appraisal of the Federal reversionary interest in the Federal land requested by the County. (B) Requirement The appraisal under subparagraph (A) shall be completed in accordance with— (i) the Uniform Appraisal Standards for Federal Land Acquisitions