Tex. Transp. Code § 621.401
In this subchapter, "weight enforcement officer" means:
(4) a municipal police officer in a municipality with a population of:
Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.
Amended by Acts 1997, 75th Leg., ch. 364, Sec. 3, eff. May 27, 1997;
Acts 1999, 76th Leg., ch. 62, Sec. 17.09, eff. Sept. 1, 1999;
Acts 1999, 76th Leg., ch. 1523, Sec. 1, eff. Sept. 1, 1999.
Acts 2005, 79th Leg., Ch. 931 (H.B. 602), Sec. 1, eff. June 18, 2005.