Ohio Revised Code Title XLV. Motor Vehicles Aeronautics Watercraft § 4503.17

(1) An affidavit, prescribed by the registrar of motor vehicles and signed by the owner of such bus, stating that such bus is to be used exclusively, during the summer months, to transport school children to and from any school function or to transport children and their authorized supervisors to and from any camping function sponsored by a nonprofit, tax-exempt, charitable, or philanthropic organization;

(2) A certificate from the state highway patrol stating that such bus is safe for operation in accordance with such standards as are prescribed by the state highway patrol.

The form of the license plate and the manner of its attachment to the vehicle shall be prescribed by the registrar of motor vehicles.

When the post-office department has the exclusive right and supervision of the use of a motor vehicle for a period of one year under contract by a United States civil service employee, the United States government shall be considered the owner of such vehicle and entitled to the registration thereof without charge.