Tex. Water Code § 35.017
If state-owned land or a portion of state-owned land is located in a priority groundwater management area, the state agency that has management and control over that land under the constitution or by statute may elect by written agreement with the commission and the district to include the state-owned land in the district. The agreement shall be entered into as provided by the Texas Intergovernmental Cooperation Act, Chapter 741, Government Code, and may include provisions for the payment by the state agency of reasonable fees to the district. If the state does not elect to enter into the agreement to include the state-owned land in the district, the state agency must establish a groundwater management plan that will conserve, protect, and prevent the waste of groundwater on that state-owned land.
Tex. Water Code § 35.017