Ohio Rev. Code Ann. § 3901.374

Unless exempted by section 3901.376 of the Revised Code, an insurer, or the insurance group of which the insurer is a member, shall regularly conduct an own risk and solvency assessment consistent with a process comparable to the own risk and solvency assessment guidance manual. The own risk and solvency assessment shall be conducted not less than annually, but also at any time when there are significant changes to the risk profile of the insurer or the insurance group of which the insurer is a member.