Ohio Rev. Code § 4506.011: Actual gross weight may be used in lieu of gross vehicle weight rating to determine qualification as commercial motor vehicle.

For purposes of this chapter, the actual gross weight of a vehicle or combination of vehicles may be used in lieu of a gross vehicle weight rating to determine whether a vehicle or combination of vehicles qualifies as a commercial motor vehicle if the gross vehicle weight rating specified by the manufacturer for the vehicle or combination of vehicles is not determinable, or if the manufacturer of the vehicle has not specified a gross vehicle weight rating.