Acts 1965, 59th Leg., vol. 2, p. 317, ch. 722.

Amended by Acts 1985, 69th Leg., ch. 250, Sec. 1, eff. Aug. 26, 1985.

Amended by:

Acts 2009, 81st Leg., R.S., Ch. 87 (S.B. 1969), Sec. 25.035, eff. September 1, 2009.