5.—(1) Unless it falls within paragraph (2), a vehicle so constructed that it can be divided into 2 parts both of which are vehicles and one of which is a motor vehicle shall (when not so divided) be treated for the purposes of the enactments mentioned in paragraph (3) as that motor vehicle with the other part attached as a trailer.
(2) A passenger vehicle so constructed that—
(a)it can be divided into 2 parts, both of which are vehicles and one of which is a motor vehicle, but cannot be so divided without the use of facilities normally available only at a workshop, and
(b)passengers carried by it when not so divided can at all times pass from either part to the other,
shall (when not so divided) be treated for the purposes of the enactments mentioned in paragraph (3) as a single motor vehicle.
(3) The enactments referred to in paragraph (1) and (2) are the Road Traffic Orders[F1, the Offenders Order] and Part II of the Transport Act (Northern Ireland) 1967F2.
(4) In this Article “passenger vehicle” means a vehicle constructed or adapted for use solely or principally for the carriage of passengers.