Tex. Spec. Dist. Code § 3001.004
(a) The district includes all of the territory of Chambers County that is east of the center line of the Trinity River and north of the center line of the Gulf Intracoastal Waterway, other than property located inside the municipal boundaries of an incorporated municipality as of January 1, 1999, as that territory may have been modified under:
(b) The boundaries of the district form a closure. A mistake in the description of the boundaries or in copying the description in the legislative process does not affect the district's:
Acts 2003, 78th Leg., ch. 1277, Sec. 1, eff. April 1, 2005.