Tex. Occ. Code § 1702.168
(a) In addition to the requirements of Section 1702.163(a), the commission by rule shall establish other qualifications for individuals who are employed in positions requiring the carrying of firearms. The qualifications may include:
Acts 1999, 76th Leg., ch. 388, Sec. 1, eff. Sept. 1, 1999.
Amended by Acts 2001, 77th Leg., ch. 1420, Sec. 14.618, eff. Sept. 1, 2001.
Acts 2009, 81st Leg., R.S., Ch. 1146 (H.B. 2730), Sec. 4.53, eff. September 1, 2009.
Acts 2019, 86th Leg., R.S., Ch. 595 (S.B. 616), Sec. 5.060, eff. September 1, 2019.