28 Tex. Admin. Code § 21.119
Each cause of action, pending litigation, matter in process before the Texas Department of Insurance or commissioner of insurance, or matter hereafter arising from an event occurring prior to the time this division becomes effective shall be determined in accordance with and governed by the provisions of statutes, rules, orders, or official interpretations in effect at the time of the occurrence of the subject event, and this section operates to save from repeal in that circumstance the application of such law and procedure in respect of any such circumstance from the amendment, change, or repeal contemplated by this division notwithstanding any provision of this division to the contrary, if any, or any provision of conflict or ambiguity.
28 Tex. Admin. Code § 21.119