No nonprofit corporation, organized under the laws of this state prior to May 4, 1982 to operate a dental service plan in the state or any of the counties thereof, the charter or certificate of incorporation of which has been approved or consented to by the insurance commissioner prior to May 4, 1982, shall be required to incorporate or reincorporate as provided herein. However, every such corporation desiring to operate such a plan shall file with the insurance commissioner its acceptance of this article within six months from May 4, 1982, and every such corporation so accepting this article shall continue, shall have all the powers, authority, and exemptions of this article, and shall be subject to all the provisions hereof except as otherwise provided herein. At the time of filing its acceptance, each such corporation must demonstrate to the satisfaction of the department that it is in compliance with the substantive provisions of this article and that it has the present ability to meet all current or contractual obligations to subscribers or to participating dentists. All preexisting corporations shall have one year from May 4, 1982 to demonstrate compliance with Section 22-21-364(3), requiring minimum working capital. In addition, each such corporation shall file an audited financial statement. Any such corporation may amend its charter to become a profit-making corporation with the prior approval of the commissioner and subject to the provisions of law.