These regulations are issued under the authority of the Mineral Leasing Act of 1920, as amended and supplemented (30 U.S.C. § 181 et seq.), the Mineral Leasing Act for Acquired Lands (30 U.S.C. §§ 351–359), the Federal Land Policy and Management Act of 1976 (43 U.S.C. § 1701 et seq.) and the Combined Hydrocarbon Leasing Act of 1981 (95 Stat. 1070).