Acts 1965, 59th Leg., vol. 2, p. 317, ch. 722. Amended by Acts 1975, 64th Leg., p. 911, ch. 341, Sec. 6, eff. June 19, 1975; Acts 1977, 65th Leg., p. 288, ch. 138, Sec. 2, eff. Aug. 29, 1977.

Amended by:

Acts 2009, 81st Leg., R.S., Ch. 87 (S.B. 1969), Sec. 25.034, eff. September 1, 2009.