Tex. Local Government Code § 43.016

(a) This section applies only to an area:

(1) eligible to be the subject of a development agreement under Subchapter G, Chapter 212; and

(2) appraised for ad valorem tax purposes as land for agricultural or wildlife management use under Subchapter C or D, Chapter 23, Tax Code, or as timber land under Subchapter E of that chapter.

(b) A municipality may not annex an area to which this section applies unless:

(1) the municipality offers to make a development agreement with the landowner under Section 212.172 that would:

(A) guarantee the continuation of the extraterritorial status of the area; and

(B) authorize the enforcement of all regulations and planning authority of the municipality that do not interfere with the use of the area for agriculture, wildlife management, or timber; and

(2) the landowner declines to make the agreement described by Subdivision (1).

(c) For purposes of Section 43.003(2) or another law, including a municipal charter or ordinance, relating to municipal authority to annex an area adjacent to the municipality, an area adjacent or contiguous to an area that is the subject of a development agreement described by Subsection (b)(1) is considered adjacent or contiguous to the municipality.

(d) A provision of a development agreement described by Subsection (b)(1) that restricts or otherwise limits the annexation of all or part of the area that is the subject of the agreement is void if the landowner files any type of subdivision plat or related development document for the area with a governmental entity that has jurisdiction over the area, regardless of how the area is appraised for ad valorem tax purposes.

(e) A development agreement described by Subsection (b)(1) is not a permit for purposes of Chapter 245.