Tex. Government Code § 792.002: AGREEMENTS WITH MEXICO.

A state agency or a political subdivision may, to the extent permitted under federal law, enter into an agreement under this chapter with:

(1) the United Mexican States or a political subdivision of the United Mexican States;

(2) an agency of the United States; or

(3) an agency or entity that is created under a treaty or executive agreement between the United States and the United Mexican States.

Added by Acts 1999, 76th Leg., ch. 1165, Sec. 1, eff. Aug. 30, 1999.