Part IV of the Traffic Act: dual purpose vehiclesE+W+S
53.—(1) Except in the case of a vehicle mentioned in paragraph (2), Part IV of the Traffic Act and regulations 54 to 57 shall apply to dual purpose vehicles to the extent that they apply to passenger-carrying vehicles.
(2) Part IV of the Traffic Act and regulations 54 to 57 shall apply to any dual purpose vehicle which is—
(a)driven by a member of the armed forces of the Crown, and
(b)used to carry passengers for naval, military or air force purposes,
to the extent that they apply to large goods vehicles.