Ohio Revised Code Title XLV. Motor Vehicles Aeronautics Watercraft § 4549.18

(A) The operator of a “commercial car,” as defined in section 4501.01 of the Revised Code, when the commercial car is required to be registered under the Revised Code, shall, when operating the commercial car, trailer, or semitrailer on the streets, roads, or highways of this state, display inside or on the vehicle the certificate of registration for the commercial car, trailer, or semitrailer provided for in section 4503.19 of the Revised Code, or shall carry the certificate on the operator's person and display it upon the demand of any state highway patrol trooper or other peace officer.

Every person operating a commercial car, trailer, or semitrailer required to be registered under the Revised Code shall permit the inspection of the certificate of registration upon demand of the superintendent or any member of the state highway patrol or other peace officer of this state.

(B) Whoever violates division (A) of this section is guilty of a commercial car certificate of registration violation, a minor misdemeanor.