Tex. Tax Code § 171.210
(b) The comptroller or attorney general may authorize the use of the confidential information in a judicial proceeding in which the state is a party. The comptroller or attorney general may authorize examination of the confidential information by:
Acts 1981, 67th Leg., p. 1703, ch. 389, Sec. 1, eff. Jan. 1, 1982.
Acts 2006, 79th Leg., 3rd C.S., Ch. 1 (H.B. 3), Sec. 7, eff. January 1, 2008.