Sec. 161.134. PROOF OF TREATMENT OR VACCINATION. In the trial of any case involving the compliance of an owner or caretaker with a provision of this chapter requiring the treatment, vaccination, dipping, or disinfecting of livestock, a person may not attempt to prove that the action was taken by a person other than an authorized representative of the commission.

Acts 1981, 67th Leg., p. 1404, ch. 388, Sec. 1, eff. Sept. 1, 1981.