Each cause of action, pending litigation, matter in process before the Texas Department of Insurance, or matter hereafter arising from an event occurring prior to the time the amendments to this subchapter became effective shall be determined in accordance with and governed by the provisions of statutes, sections, 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 these sections or any conflict or ambiguity therein.