16 USC 450bb - Harpers Ferry National Historical Park

(a) In general 
To carry out the purposes of sections 450bb to 450bb–2 of this title, the Secretary of the Interior (referred to in sections 450bb to 450bb–2 of this title as the Secretary) is authorized to acquire, by purchase from a willing seller with donated or appropriated funds, by donation, or by exchange, land or an interest in land within the boundaries as generally depicted on the map entitled Boundary Map, Harpers Ferry National Historical Park, numbered 38580,021A, and dated April 1979.
(b) Bradley and Ruth Nash Addition 
The Secretary is authorized to acquire, by donation only, approximately 27 acres of land or interests in land that are outside the boundary of the Harpers Ferry National Historical Park and generally depicted on the map entitled Proposed Bradley and Ruth Nash AdditionHarpers Ferry National Historical Park, numbered 38580056, and dated April 1, 1989.
(c) Boundary expansion 

(1) In general 
The Secretary is authorized to acquire, by purchase from a willing seller with donated or appropriated funds, by donation, or by exchange, land or an interest in land within the area depicted as Private Lands on the map entitled Harpers Ferry National Historical Park Proposed Boundary Expansion, numbered 385/80,126, and dated July 14, 2003.
(2) Administration 
The Secretary shall
(A) transfer to the National Park Service for inclusion in the Harpers Ferry National Historical Park (referred to in sections 450bb to 450bb–2 of this title as the Park) the land depicted on the map referred to in paragraph (1) as U.S. Fish and Wildlife Service Lands and revise the boundary of the Park accordingly; and
(B) revise the boundary of the Park to include the land depicted on the map referred to in paragraph (1) as Appalachian NST and exclude that land from the boundary of the Appalachian National Scenic Trail.
(d) Maximum number of acres 
The number of acres of the Park shall not exceed 3,745.
(e) Maps 
The maps referred to in this section shall be on file and available for public inspection in the appropriate offices of the National Park Service.
(f) Acquired land 
Land or an interest in land acquired under this section shall become a part of the Park, subject to the laws (including regulations) applicable to the Park.
(g) Authorization of appropriations 
There are authorized to be appropriated such sums as are necessary to carry out this section.