Notwithstanding any other provisions of law, the Secretary, with respect to the public lands and the Secretary of Agriculture, with respect to the acquisition of access over non-Federal lands to units of the National Forest System, are authorized to acquire pursuant to this Act by purchase, exchange, donation, or eminent domain, lands or interests therein: Provided, That with respect to the public lands, the Secretary may exercise the power of eminent domain only if necessary to secure access to public lands, and then only if the lands so acquired are confined to as narrow a corridor as is necessary to serve such purpose. Nothing in this subsection shall be construed as expanding or limiting the authority of the Secretary of Agriculture to acquire land by eminent domain within the boundaries of units of the National Forest System.

Acquisitions pursuant to this section shall be consistent with the mission of the department involved and with applicable departmental land-use plans.

Except as provided in subsection (e), lands and interests in lands acquired by the Secretary pursuant to this section or section 1716 of this title shall, upon acceptance of title, become public lands, and, for the administration of public land laws not repealed by this Act, shall remain public lands. If such acquired lands or interests in lands are located within the exterior boundaries of a grazing district established pursuant to section 315 of this title, they shall become a part of that district. Lands and interests in lands acquired pursuant to this section which are within boundaries of the National Forest System may be transferred to the Secretary of Agriculture and shall then become National Forest System lands and subject to all the laws, rules, and regulations applicable thereto.

Lands and interests in lands acquired by the Secretary of Agriculture pursuant to this section shall, upon acceptance of title, become National Forest System lands subject to all the laws, rules, and regulations applicable thereto.

Lands acquired by the Secretary pursuant to this section or section 1716 of this title in exchange for lands which were revested in the United States pursuant to the provisions of the Act of June 9, 1916 (39 Stat. 218) or reconveyed to the United States pursuant to the provisions of the Act of February 26, 1919 (40 Stat. 1179), shall be considered for all purposes to have the same status as, and shall be administered in accordance with the same provisions of law applicable to, the revested or reconveyed lands exchanged for the lands acquired by the Secretary.

(Pub. L. 94–579, title II, § 205, Oct. 21, 1976, 90 Stat. 2755; Pub. L. 99–632, § 5, Nov. 7, 1986, 100 Stat. 3521.)