16 U.S.C. § 715d — Purchase or rental of approved areas or interests therein; gifts and devises; United States lands

The Secretary of the Interior may— (1) purchase or rent such areas or interests in it as have been approved for purchase or rental by the Commission at the price or prices fixed by the Commission; and (2) acquire, by gift or devise, any area or interests in it; which he determines to be suitable for use as an inviolate sanctuary, or for any other management purpose, for migratory birds. The Secretary may pay, when deemed necessary by him and from moneys authorized to be appropriated for the purposes of this subchapter (A) the purchase or rental price of any such area or interest in it, and (B) the expenses incident to the location, examination, survey, and acquisition of title (including options) of any such area or interest in it. No lands acquired, held, or used by the United States for military purposes must be subject to any provisions of this subchapter.