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 or vaccination 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.
Amended by: 
Acts 2021, 87th Leg., R.S., Ch. 849 (S.B. 705), Sec. 16, eff. September 1, 2021.