Ohio Revised Code Title XLV. Motor Vehicles Aeronautics Watercraft § 4513.113

(A) No person shall sell, lease, rent, or operate on a street or highway any unit of farm machinery that is designed by its manufacturer to operate at a speed greater than twenty-five miles per hour unless the unit displays both of the following:

(B) No person operating a tractor on a street or highway that is designed by its manufacturer to operate at a speed greater than twenty-five miles per hour and that is towing, pulling, or otherwise drawing a unit of farm machinery while operating at a speed greater than twenty-five miles per hour shall fail to display both of the following on the unit of farm machinery:

(C) No person shall operate an agricultural tractor that is designed by its manufacturer to operate at a speed greater than twenty-five miles per hour unless the person possesses documentation published or provided by the manufacturer indicating the maximum speed in miles per hour at which the manufacturer designed the agricultural tractor to operate.

(D) Whoever violates this section is guilty of a minor misdemeanor.