(a) Boundaries; inspection of map
The park shall comprise the area generally depicted on the map entitled "Valley Forge National Historical Park", dated June 1979, and numbered VF–91,001, which shall be on file and available for inspection in the offices of the National Park Service, Department of the Interior, Washington, District of Columbia, and in the offices of the superintendent of the park. After advising the Committee on Energy and Natural Resources of the Senate and the Committee on Natural Resources of the House of Representatives, in writing, the Secretary may make minor revisions of the boundaries of the park when necessary by publication of a revised map or other boundary description in the Federal Register.

(b) Acquisition of lands
Within the boundaries of the park, the Secretary may acquire lands and interests therein by donation, purchase with donated or appropriated funds, exchange, or transfer. Any property owned by the Commonwealth of Pennsylvania or any political subdivision thereof may be acquired only by donation. The effective date of such donation shall not be prior to October 1, 1976.

(c) Reservation of rights by grantors; compensation for land
Except for property deemed by the Secretary to be essential for visitor facilities, or for access to or administration of the park, any owner or owners of improved property on the date of its acquisition by the Secretary may, as a condition of such acquisition, retain for themselves and their successors or assigns a right of use and occupancy of the improved property for noncommercial residential purposes for a definite term not to exceed twenty-five years, or in lieu thereof, for a term ending at the death of the owner, or the death of his or her spouse, whichever is the later. The owner shall elect the term to be reserved. Unless the property is wholly or partially donated, the Secretary shall pay to the owner the fair market value of the property on the date of such acquisition, less the fair market value on such date of the right retained by the owner.

(d) Termination of grantor's rights
The Secretary may terminate a right of use and occupancy retained pursuant to this section upon his determination that such use and occupancy is being exercised in a manner not consistent with the purposes of this subchapter, and upon tender to the holder of the right of an amount equal to the fair market value of that portion of the right which remains unexpired on the date of termination.

(e) "Improved property" defined
The term "improved property", as used in this section shall mean a detached, noncommercial residential dwelling, the construction of which was begun before January 1, 1975 (hereafter referred to as "dwelling"), together with so much of the land on which the dwelling is situated, the said land being in the same ownership as the dwelling, as the Secretary shall designate to be reasonably necessary for the enjoyment of the dwelling for the sole purpose of noncommercial residential use, together with any structures accessory to the dwelling which are situated on the land so designated.