(a) This subchapter applies to a policy issued on or after January 1, 1989.
(b) This subchapter also applies to a policy issued by a company after the date specified in a written notice:
(1) that was filed with the State Board of Insurance after August 31, 1981, but before January 1, 1989; and
(2) under which the company filing the notice elected to comply before January 1, 1989, with the law codified by this subchapter.