43 U.S.C. § 449

A desert-land entry within the exterior limits of a Government reclamation project may be assigned in whole or in part under section 324 of this title , and the benefits and limitations of section 448 of this title shall apply to such desert-land entryman and his assignees: Provided , That all such assignments shall conform to and be in accordance with farm units to be established by the Secretary of the Interior upon the application of the desert-land entryman. All such assignments made in good faith prior to July 24, 1912 , shall be recognized under this section.