25 U.S. Code § 463c - Gift of lands by Arizona
The State of Arizona may relinquish in favor of the Papago Indians such tracts within the townships referred to in section 463a of this title as it may see fit and shall have the right to select other unreserved and nonmineral public lands within the State of Arizona equal in area to those relinquished, said lieu selections to be made in the same manner as is provided for in the Enabling Act of June 20, 1910 (36 Stat. 558), or in the discretion of the State of Arizona under the provisions of section 315g of title 43. The payment of fees or commissions is waived in all lieu selections made pursuant to this section.
The Enabling Act of June 20, 1910, referred to in text, probably means act June 20, 1910, ch. 310, 36 Stat. 557, which provided that, subject to certain limitations, lieu selections of land in Arizona are to be made pursuant to sections 851 and 852 of Title 43, Public Lands.