43 U.S.C. § 629

All notices required by the irrigation district laws mentioned in this chapter shall, as soon as such notices are issued, be delivered to the officer designated by the Secretary of the Interior of the proper land office in cases where unpatented lands are affected thereby, and to the entryman whose unpatented lands are included therein, and the United States and such entryman shall be given the same rights to be heard by petition, answer, remonstrance, appeal, or otherwise as are given to persons holding lands in private ownership, and all entrymen shall be given the same rights of redemption as are given to the owners of lands held in private ownership.