Acts 1965, 59th Leg., vol. 2, p. 317, ch. 722. Amended by Acts 1971, 62nd Leg., p. 905, ch. 131, Sec. 1, eff. May 10, 1971.

Amended by Acts 1979, 66th Leg., p. 393, ch. 184, Sec. 1, eff. Sept. 1, 1979. Subsec. (b) amended by Acts 1983, 68th Leg., p. 2983, ch. 514, Sec. 1, eff. June 19, 1983; Subsec. (a) amended by Acts 1991, 72nd Leg., ch. 67, Sec. 1, eff. Sept. 1, 1991; Subsec. (b) amended by Acts 2001, 77th Leg., ch. 344, Sec. 1, eff. Sept. 1, 2001.

Amended by:

Acts 2015, 84th Leg., R.S., Ch. 929 (H.B. 2150), Sec. 1, eff. September 1, 2015.

Acts 2017, 85th Leg., R.S., Ch. 745 (S.B. 1298), Sec. 1, eff. September 1, 2017.

Acts 2019, 86th Leg., R.S., Ch. 469 (H.B. 4173), Sec. 3.01, eff. January 1, 2021.

Text of article effective until January 01, 2021