(a) Certificates of authority issued or renewed under this title shall continue in force as long as the insurer is entitled thereto under this title and until suspended, revoked or terminated at the request of the insurer; subject, however, to continuance of the certificate by the insurer each year by:

(1) Payment prior to March 1 of the continuation fee provided in Section 27-4-2; and

(2) Due filing by the insurer of its annual statement for the calendar year preceding as required under Section 27-3-26.

(b) If not so continued by the insurer, its certificate of authority shall expire at midnight on the May 31, next following, such failure of the insurer so to continue it in force. The commissioner shall promptly notify the insurer of the occurrence of any such failure resulting in impending expiration of its certificate of authority.

(c) The commissioner may, in his discretion, reinstate a certificate of authority which the insurer has inadvertently permitted to expire, after the insurer has fully cured all its failures which resulted in such expiration and upon payment by the insurer of the fee for reinstatement, in addition to the current continuation fee, in the amounts provided in Section 27-4-2. Otherwise, the insurer shall be granted another certificate of authority only after filing application therefor and meeting all other requirements as for an original certificate of authority in this state.

(d) The commissioner may amend a certificate of authority at any time to accord with changes in the insurer's charter or insuring powers.