Tex. Ins. Code § 541.201
(a) The attorney general may bring an action under this section if the attorney general has reason to believe that:
(1) a person engaged in the business of insurance in this state is engaging in, has engaged in, or is about to engage in an act or practice defined as unlawful under:
Added by Acts 2003, 78th Leg., ch. 1274, Sec. 2, eff. April 1, 2005.