Ohio Revised Code Title XLV. Motor Vehicles Aeronautics Watercraft § 4503.35

(1) Motor vehicles operated by troopers of the state highway patrol;

(2) Motor vehicles operated by or on behalf of any person whose responsibilities include involvement in authorized civil or criminal investigations requiring that the presence and identity of the vehicle occupants be undisclosed;

(3) Motor vehicles used to assist crime victims when a state agency determines that the situation warrants it.