When notice required under section 4712 or section 4713 of this title is provided by mail, such notice shall be by certified mail, except that in the case of cancellation for nonpayment of premium, notice shall be by certified mail or certificate of mailing. (Added 1985, No. 265 (Adj. Sess.), § 3; amended 1989, No. 171 (Adj. Sess.), § 8, eff. Sept. 1, 1990.)