25 C.F.R. § 173.1 Terms used.
Title 25 - Indians
When used in this part “Secretary” refers to the Secretary of the Interior; “project” to the Federal Indian irrigation project on which concession, lease or permit is granted, and “project engineer” to the engineer in charge of said project.
Title 25: Indians
PART 173—CONCESSIONS, PERMITS AND LEASES ON LANDS WITHDRAWN OR ACQUIRED IN CONNECTION WITH INDIAN IRRIGATION PROJECTS
§ 173.1 Terms used.

