Ohio Rev. Code Ann. § 3919.18

No corporation, company, or association organized under section 3919.01 of the Revised Code issuing endowments, certificates, or policies, or undertaking or promising to pay to members during life any sum of money, or thing of value, or certificate, or policy guaranteeing any fixed amount to be paid at death, except such fixed amounts or endowments which are conditioned upon their being realized from the assessments made on members to meet them, shall do business in this state until it complies with the laws regulating regular mutual life insurance companies.