Ohio Rev. Code Ann. § 121.93
(A) An agency shall review its operations to identify principles of law or policy that have not been stated in a rule and that the agency is relying upon in conducting adjudications or other determinations of rights and liabilities or in issuing writings and other materials, such as instructions, directives, policy statements, guidelines, handbooks, manuals, advisories, notices, circulars, advertisements, forms, letters, and opinions. An agency is not required to identify principles of law or policy relied upon in issuing internal management rules as defined n section 111.15 of the Revised Code. The agency shall complete at least one of the reviews during a governor's term. Within three months after the expiration of a governor's term, the agency electronically shall transmit a report to the joint committee on agency rule review containing the following:
(B) The agency shall determine whether a principle of law or policy thus identified has a general and uniform operation and establishes a legal regulation or standard that would not exist in its absence. If the principle of law or policy has these characteristics, the agency shall determine whether the principle of law or policy should be supplanted by its restatement in a rule to achieve one or more of the following as they are relevant to the principle of law or policy: