19.—(1) If an authorised person has reasonable grounds to suspect that there is relevant evidence in a vehicle, other than a vehicle used wholly or mainly as a private dwelling, the authorised officer may, at any time—
(a)stop and detain the vehicle for the purposes of entering and searching it; and
(b)enter the vehicle and search it for that evidence.
(2) Where—
(a)an authorised person has stopped a vehicle under this Article; and
(b)the authorised person considers that it would be impractical to search the vehicle in the place where it has stopped,
the authorised person may require the vehicle to be taken to such a place as the authorised officer directs to enable the vehicle to be searched.
(3) An authorised person may require—
(a)any person travelling in a vehicle; or
(b)the registered keeper of a vehicle,
to afford such facilities and assistance with respect to matters under that person’s control as the authorised person considers would facilitate the exercise of any power conferred by this Article.
(4) The powers conferred by this Article may be exercised in any place to which the authorised person has access (whether or not it is a place to which the public has access).
(5) In this Article, “relevant evidence” means evidence that an offence under this Order has been committed.