; and (B) shall be managed in accordance with— (i) land management plans adopted under section 202 of that Act ( 43 U.S.C. 1712 ); and (ii) existing cooperative conservation agreements. (b) Release of National Wildlife Refuge System land (1) Finding Congress finds that any Federal land within the portion of the Sheldon National Wildlife Refuge in the County that is managed as potential wilderness or a wilderness study area that has not been designated as wilderness by this Act does not need to be managed to maintain the suitability of the Federal land for future wilderness designation. (2) Management The Federal land described in paragraph (1) shall be managed in accordance with the applicable comprehensive conservation plan prepared under section 4(e) of the National Wildlife Refuge System Administration Act of 1966 ( 16 U.S.C. 668dd(e) )). IV Voluntary donation of grazing permits and leases 401. Voluntary donation of grazing permits and leases (a) In general The Secretary shall accept the donation of any valid existing lease or permit authorizing grazing on public land located within the boundaries of the Mosquito Valley and Horse Lake allotments of the Bureau of Land Management in the State. (b) Termination With respect to each permit or lease donated under subsection (a), the Secretary shall— (1) terminate the grazing permit or lease