Article 4 Exemptions
(1)
None of the controls specified in article 3 apply to—
(a)
anything done with the permission or at the direction of a police constable in uniform or a traffic warden; or
(b)
in respect of a vehicle being used for ambulance, fire brigade or police purposes.
(2)
The controls specified in article 3(d) do not apply to a local bus being used to provide a local bus service.