Tex. Penal Code § 46.05
(a) A person commits an offense if the person intentionally or knowingly possesses, manufactures, transports, repairs, or sells:
(1) any of the following items, unless the item is registered in the National Firearms Registration and Transfer Record maintained by the Bureau of Alcohol, Tobacco, Firearms and Explosives or otherwise not subject to that registration requirement or unless the item is classified as a curio or relic by the United States Department of Justice:
(d) It is an affirmative defense to prosecution under this section that the actor's conduct:
(f) It is a defense to prosecution under this section for the possession of a chemical dispensing device that the actor is a security officer and has received training on the use of the chemical dispensing device by a training program that is:
Acts 1973, 63rd Leg., p. 883, ch. 399, Sec. 1, eff. Jan. 1, 1974.
Amended by Acts 1975, 64th Leg., p. 918, ch. 342, Sec. 15, eff. Sept. 1, 1975;
Acts 1983, 68th Leg., p. 2650, ch. 457, Sec. 2, eff. Sept. 1, 1983;
Acts 1983, 68th Leg., p. 4831, ch. 852, Sec. 2, eff. Sept. 1, 1983;
Acts 1987, 70th Leg., ch. 167, Sec. 5.01(a)(47), eff. Sept. 1, 1987;
Acts 1991, 72nd Leg., ch. 229, Sec. 2, eff. Sept. 1, 1991; Renumbered from Penal Code Sec. 46.06 and amended by Acts 1993, 73rd Leg., ch. 900, Sec. 1.01, eff. Sept. 1, 1994;
Acts 2003, 78th Leg., ch. 1071, Sec. 1, eff. Sept. 1, 2003.
Acts 2005, 79th Leg., Ch. 1035 (H.B. 1132), Sec. 2.01, eff. September 1, 2005.
Acts 2005, 79th Leg., Ch. 1278 (H.B. 2303), Sec. 7, eff. September 1, 2005.
Acts 2011, 82nd Leg., R.S., Ch. 920 (S.B. 1416), Sec. 2, eff. September 1, 2011.
Acts 2013, 83rd Leg., R.S., Ch. 93 (S.B. 686), Sec. 2.60, eff. May 18, 2013.
Acts 2013, 83rd Leg., R.S., Ch. 960 (H.B. 1862), Sec. 1, eff. September 1, 2013.
Acts 2015, 84th Leg., R.S., Ch. 69 (S.B. 473), Sec. 1, eff. September 1, 2015.
Acts 2015, 84th Leg., R.S., Ch. 69 (S.B. 473), Sec. 2, eff. September 1, 2015.
Acts 2017, 85th Leg., R.S., Ch. 155 (H.B. 1819), Sec. 1, eff. September 1, 2017.
Acts 2017, 85th Leg., R.S., Ch. 814 (H.B. 913), Sec. 2, eff. September 1, 2017.
Acts 2019, 86th Leg., R.S., Ch. 216 (H.B. 446), Sec. 2, eff. September 1, 2019.
Acts 2019, 86th Leg., R.S., Ch. 467 (H.B. 4170), Sec. 13.001, eff. September 1, 2019.
Acts 2021, 87th Leg., R.S., Ch. 642 (H.B. 957), Sec. 2, eff. September 1, 2021.
Acts 2025, 89th Leg., R.S., Ch. 845 (S.B. 1596), Sec. 1, eff. September 1, 2025.