In general— Not later than 90 days after the date on which the Secretary receives a request from the County to convey all or a portion of the Federal land, subject to valid existing rights and to such terms and conditions as the Secretary determines to be necessary and notwithstanding the land use planning requirements of sections 202 and 203 of the Federal Land Policy and Management Act of 1976 (
43 U.S.C. 1712, 1713), the Secretary shall convey to the County all right, title, and interest of the United States in and to the Federal land identified on the map.