; and (B) has otherwise acquired sufficient land or interests in land within the boundaries of the Monument to constitute a manageable unit. (b) Boundaries The boundaries of Monument shall be the boundaries generally depicted on the Map. (c) Availability of map The Map shall be on file and available for public inspection in the appropriate offices of the National Park Service. (d) Acquisition of authority The Secretary may only acquire any land or interest in land located within the boundary of the Monument by— (1) donation; (2) purchase with donated funds; or (3) exchange. (e) Administration (1) In general The Secretary shall administer the Monument in accordance with— (A) this Act