Tex. Loc. Gov't Code § 213.003
(a) A comprehensive plan may be adopted or amended by ordinance following:
Added by Acts 1997, 75th Leg., ch. 459, Sec. 1, eff. Sept. 1, 1997.
Amended by Acts 1999, 76th Leg., ch. 62, Sec. 13.07, eff. Sept. 1, 1999;
Acts 2001, 77th Leg., ch. 1420, Sec. 12.002(2), eff. Sept. 1, 2001.