Code of Federal Regulations Title 43. Public Lands:  Interior § 43.3811.2–3 Lands in Indian reservations

All lands contained within the boundaries of an established Indian Reservation are withdrawn from all location, entry, and appropriation under the General Mining Law of 1872, as amended. All minerals on Indian Reservations may only be acquired by lease pursuant to the Act of May 11, 1938 (25 U.S.C. 396a), the Act of March 3, 1909 (25 U.S.C. 396), or the Indian Mineral Development Act of 1982 (25 U.S.C. 2101 et seq.). The regulations governing the mineral leasing of Indian lands are found in 25 CFR Chapter I Subchapter I.