43 U.S.C. § 424
Disposal of lands classified as temporarily or permanently unproductive; persons who may take
The Secretary of the Interior, hereinafter styled the Secretary, is authorized in connection with Federal irrigation projects to dispose of vacant public lands designated under sections 423 to 423g and 610 of this title, as temporarily unproductive or permanently unproductive to resident farm owners, and resident entrymen on Federal irrigation projects, in accordance with the provisions of sections 424 to 424e of this title.