Sec. 341.406.  WHEN ACT OR OMISSION NOT VIOLATION.  An act or omission does not violate this title if the act or omission conforms to:
(1)  Subchapter C; 
(2)  a provision determined by the commissioner;  or
(3)  an interpretation of this title that is in effect at the time of the act or omission and that was made by:
(A)  the commissioner under Section 14.108;  or
(B)  an appellate court of this state or the United States.
Acts 1997, 75th Leg., ch. 1008, Sec. 1, eff. Sept. 1, 1997.