Tex. Spec. Dist. Code § 8825.004
The district's boundaries are coextensive with the boundaries of Austin, Grimes, Walker, and Waller Counties, unless the district's territory has been modified under:
Added by Acts 2009, 81st Leg., R.S., Ch. 1139 (H.B. 2619), Sec. 1.05, eff. April 1, 2011.