administrative jurisdiction of Federal land or interests in Federal land adjacent to the existing boundary at Camp Saxton, as reflected on the map. Upon finalizing an agreement to accept administrative jurisdiction of Federal land or interests in Federal land, the Secretary shall expand the boundary of the historical park to encompass that Federal land or interests in Federal land. (c) Administration (1) In general The Secretary shall administer the historical park in accordance with this Act and with the laws generally applicable to units of the National Park System. (2) Management Plan If the management plan for the Reconstruction Era National Monument— (A) has not been completed on or before the date of enactment of this Act, the Secretary shall incorporate all provisions of this Act into the planning process and complete a management plan for the historical park within 3 years