Tex. Civ. Prac. & Rem. Code § 104.005
Except as provided by Section 104.0035, the state is not liable for the defense of an action covered by this chapter or for damages, court costs, or attorney's fees unless:
Acts 1985, 69th Leg., ch. 959, Sec. 1, eff. Sept. 1, 1985.
Amended by Acts 1987, 70th Leg., 2nd C.S., ch. 29, Sec. 3, eff. Oct. 20, 1987.