Tex. Spec. Dist. Code § 11005.051
(a) The boundaries of the district are coextensive with the boundaries of the city as those boundaries existed on January 1, 1973, and as the district territory may have been modified under:
Added by Acts 2015, 84th Leg., R.S., Ch. 855 (S.B. 1162), Sec. 1.07, eff. April 1, 2017.