25 U.S. Code § 1780k - Inter-Pueblo cooperation
(a) Demarcation of boundary
The Pueblo of Santa Clara and the Pueblo may, by agreement, demarcate a boundary between their respective tribal land within Township 20 North, Range 7 East, in Rio Arriba County, New Mexico, and may exchange or otherwise convey land between them in that township.
(b) Action by Secretary of the Interior
In accordance with any agreement under subsection (a), the Secretary of the Interior shall, without further administrative procedures or environmental or other analyses—
(3) approve land exchanges and conveyances as agreed upon by the Pueblo of Santa Clara and the Pueblo; and