The Secretary of the Interior may acquire by donation, purchase, exchange, or otherwise, lands and interests in lands within the area described in section 430uu–1 of this title.

Any lands described in section 430uu–1 of this title that are a part of the Beaverhead National Forest on May 17, 1963, are hereby excluded from the forest and added to the Big Hole National Battlefield.

Lands included in the Big Hole National Battlefield pursuant to sections 430uu to 430uu–4 of this title shall be administered in accordance with the provisions of the Act entitled “An Act to establish a National Park Service, and for other purposes”, approved August 25, 1916 (39 Stat. 535; 16 U.S.C. 1–3),1 as amended and supplemented.