A Feb. 23, 1999 Stipulation and Agreement in the Arizona v. California case (Arizona III) The Settlement Agreement at page three provides: “C. Disputed Boundary the parties agree not to seek adjudication in this phase of the litigation of the validity, correctness, or propriety of the January 17, 1969 Order of the Secretary of the Interior. Western Boundary of the Colorado River Indian Reservation from the tip of Riverside Mtn. Through section 12 T.5 S., R23 E SBM CA. No 90-1-5-668, 41-54 (1969 Secretarial Order – (this should be solicitor opinion)) The united States, but not the other parties to this Stipulation and Agreement, agree that the lands described in the 1969 Secretarial Order, are included within the Reservation set aside by the Executive Order of May 15, 1876 and are held in trust by the United States for the benefit of the Tribes. The State of California disagrees, and expressly reserves the right the challenge the validity, correctness, and propriety of the 1969 secretarial Order.”