As used in this chapter: “Contract holder” means a person entering into a subscription contract with a nonstock corporation. “Dental services plans” means any arrangement for offering or administering prepaid dental services by a nonstock corporation licensed under this chapter. “Nonstock corporation” means a foreign or domestic nonstock corporation which is subject to regulation and licensing under this chapter and which operates a dental services plan or an optometric services plan. “Optometric services plan” means any arrangement for offering or administering prepaid optometric services by a nonstock corporation licensed under this chapter. “Plan” means any dental services plan or any optometric services plan subject to regulation under this chapter. “Subscriber” means any person entitled to benefits under the terms and conditions of a subscription contract. “Subscription contract” means a written contract which is issued to a contract holder by a nonstock corporation and which provides dental or optometric services or benefits for dental or optometric services.