Tex. Water Code § 8.020

In cooperating with or carrying out discussions with a particular state under Section 8.051 of this code or in negotiating with a particular state under Section 8.056 of this code, the commission may appoint one or more persons who reside within an area of this state that is adjacent to the particular state with which this state is cooperating, having discussions, or negotiating, and who are knowledgeable with regard to the water concerns of the adjacent state, to join the commission in the cooperative activity, discussions, or negotiations and to advise the commission.