The Secretary is authorized, subject to the limitations, conditions, and restrictions imposed by this subchapter, to acquire the land, water, and other property, and improvements thereon, and any interests therein (including easements) within the boundary described in section
460s–1 of this title by donation, purchase with donated or appropriated funds, transfer from any Federal agency, exchange, or condemnation; except that such authority to acquire by condemnation shall be exercised only in the manner and to the extent specifically authorized in this subchapter.