Combination means a variation of the key that permits the starting system of a particular vehicle to be operated.
Key means a physical device or an electronic code which, when inserted into the starting system (by physical or electronic means), enables the vehicle operator to activate the engine or motor.
Open-body type vehicle means a vehicle having no occupant compartment doors or vehicle having readily detachable occupant compartment doors.
Starting system means the vehicle system used in conjunction with the key to activate the engine or motor.
Vehicle type, as used in S5.1.2, refers to passenger car, truck, or multipurpose passenger vehicle, as those terms are defined in 49 CFR 571.3 .
49 C.F.R. §571.114