4—Meaning of vehicle
(1) For the purposes of the Light Vehicle Standards, a reference to a vehicle is taken to be a reference to a light vehicle.
(2) To remove any doubt—
(a) a trailer is a "vehicle"; and
(b) a reference in the Light Vehicle Standards to a "vehicle" includes a reference to the equipment fitted to, or forming part of, the vehicle; and
(c) a reference in the Light Vehicle Standards to a vehicle is taken to be a reference to a single vehicle.