Each cause of action, pending litigation, or matter in process before the Texas Department of Insurance or commissioner of insurance will be determined in accordance with and governed by the applicable statutes, rules, orders, or interpretations of the Texas Department of Insurance in effect at the time of the occurrence of the subject event; and this section operates to save the application of such past procedure and law to any such event from amendment, change, or repeal, notwithstanding any provision of this subchapter or any conflict or ambiguity therein.
28 Tex. Admin. Code § 3.811