Five (5) or more dentists duly licensed to practice under the laws of this state, who give advance written notice by registered or certified mail to the Tennessee Dental Association of their intent to organize a nonprofit dental service corporation, may associate themselves by written articles of association for the incorporation of a nonprofit dental service corporation. The board of each nonprofit dental service corporation must at all times include dentists who maintain an active license to practice under the laws of this state. The laws of this state relative to insurance companies or to the business of insurance, and acts in amendment of the laws or in addition to the laws, do not apply to any nonprofit dental service corporation unless expressly so provided in the laws or acts.