Tex. Lab. Code § 413.0513
(b) Confidential information, and other information to which access is restricted by law, developed by or on behalf of the division under Section 413.0511 or 413.0512 is not subject to discovery or court subpoena in any action other than:
Added by Acts 2001, 77th Leg., ch. 1456, Sec. 1.02, eff. June 17, 2001.
Amended by Acts 2003, 78th Leg., ch. 963, Sec. 3, eff. June 20, 2003.
Acts 2005, 79th Leg., Ch. 265 (H.B. 7), Sec. 3.253, eff. September 1, 2005.