Ohio Rev. Code § 1181.08: Adoption of rules.

(A) In addition to the specific authority given the superintendent of financial institutions by other provisions of the Revised Code, the superintendent may from time to time adopt such rules as the superintendent considers necessary or appropriate for the administration of the division of financial institutions or to carry out any other duty of the superintendent.

(B) The superintendent shall not adopt any rule that has a retroactive effective date or apply any rule to conduct that took place exclusively before the effective date of that rule.