Tex. Spec. Dist. Code § 1002.004
(a) The district is composed of the territory described by Section 1, Chapter 120, Acts of the 60th Legislature, Regular Session, 1967, as that territory may have been modified under:
(b) The legislature finds that the boundaries and field notes of the district contained in Section 1, Chapter 120, Acts of the 60th Legislature, Regular Session, 1967, form a closure. A mistake in the field notes or in copying the field notes in the legislative process does not affect:
Acts 2003, 78th Leg., ch. 1277, Sec. 1, eff. April 1, 2005.