Ohio Rev. Code § 5162.35
The department of medicaid may enter into contracts with one or more other state agencies or political subdivisions to have the state agency or political subdivision administer one or more components of the medicaid program, or one or more aspects of a component, under the department's supervision. A state agency or political subdivision that enters into such a contract shall comply with the terms of the contract and any rules the medicaid director has adopted governing the component, or aspect of the component, that the state agency or political subdivision is to administer, including any rules establishing review, audit, and corrective action plan requirements. A contract with a state agency shall be in the form of an interagency agreement.
A state agency or political subdivision that enters into a contract with the department under this section shall reimburse the department for the nonfederal share of the cost to the department of performing, or contracting for the performance of, a fiscal audit of the component of the medicaid program, or aspect of the component, that the state agency or political subdivision administers if rules governing the component, or aspect of the component, require that a fiscal audit be conducted.
R.C. § 5162.35