N.C. Gen. Stat. § 58-65-145
No corporations organized under the laws of this State prior to the ratification of this Article and Article 66 of this Chapter, for the purposes herein provided, shall be required to reincorporate as provided for herein, and the provisions of this Article and Article 66 of this Chapter shall apply to said corporations only with regard to operations by said corporations with respect to subscribers' contracts, participating hospital contracts, reserves, investments, reports, visitations, expenses, taxation, amendments to charters, supervision of Commissioner of Insurance, application for certificate, issuance of certificates, licensing of agents after the date of the passage of this Article and Article 66 of this Chapter, provided, however, as soon as practical hereafter and in accordance with rules and regulations adopted by the Commissioner of Insurance said corporations shall conform to this Article and Article 66 of this Chapter as near as practical with respect to subscribers' contracts, endorsements, riders, and applications entered into prior to the ratification of this Article and Article 66 of this Chapter.
N.C. Gen. Stat. § 58-65-145