Tex. Gov't Code § 2204.401
The governor may grant to the United States in accordance with this subchapter those portions of, or easements on, the beds and banks of the Rio Grande in Brewster, Cameron, Hidalgo, Hudspeth, Jeff Davis, Kinney, Maverick, Presidio, Starr, Terrell, Val Verde, Webb, and Zapata counties:
(2) that may be necessary or expedient to facilitate the accomplishment of projects for the following purposes, as provided for in the Treaty to Resolve Pending Boundary Differences and Maintain the Rio Grande and Colorado River as the International Boundary between the United States of America and the United Mexican States, entered into force April 18, 1972, and the American-Mexican Boundary Treaty Act of 1972 (22 U.S.C. Sections 277d-34 et seq.):
Added by Acts 1993, 73rd Leg., ch. 268, Sec. 1, eff. Sept. 1, 1993.