Ohio Revised Code Title XLV. Motor Vehicles Aeronautics Watercraft § 4561.19

Upon receipt of each license application and each application for transfer of registration properly completed and accompanied by the required license tax, the director of transportation shall forward to the owner a certificate of registration which certificate shall thereafter be kept in the licensed aircraft and shall be available for inspection at all times during the current year. Before receipt of such registration certificate, a copy of the application for registration shall be so kept in the aircraft.