To acquire by donation, by purchase with donated funds or with funds appropriated specifically for that purpose, or by exchange, any land or interest in land within the area described in section
460y–8 of this title, which the Secretary, in his judgment, determines to be desirable for consolidation of public lands within the Area in order to facilitate efficient and beneficial management of the public lands or otherwise to accomplish the purposes of this subchapter: Provided, That the Secretary may not acquire, without the consent of the owner, any such lands or interests therein which are utilized on October 21, 1970, for residential, agricultural, or commercial purposes so long as he finds such property is devoted to uses compatible with the purposes of this subchapter. Any lands or interests in lands acquired by the United States under the authority of this section shall, upon acceptance of title, become public lands, and shall become a part of the area subject to all the laws and regulations applicable thereto.