25 U.S. Code § 624 - Exchange of lands
For the purpose of improving the land tenure pattern and consolidating Pueblo Indian lands, the Secretary of the Interior is authorized, under such regulations as he may prescribe, to acquire by exchange any lands or interests therein, including improvements and water rights, within the Pueblo land consolidation areas, and to convey in exchange therefor not to exceed an equal value of unappropriated public lands within the State of New Mexico, or, with the consent of the Pueblo authorities any Pueblo tribal lands or interest therein, including improvements and water rights.
Either party to an exchange under this section may reserve minerals, easements, or rights of use.
The Secretary may execute any title documents necessary to effect the exchanges authorized by this section.
Title to all lands acquired under the provisions of this section shall be taken in the name of the United States in trust for the respective Pueblo Indian tribes.