50.—(1) Part IV of the Traffic Act and regulations 54 to 57 shall not apply to a large goods vehicle—
(a)of a class included in category F, G or H or sub-category C1+E (8.25 tonnes), or
(b)which is an exempted goods vehicle or an exempted military vehicle.
(2) Part IV of the Traffic Act and regulations 54 to 57 shall not apply to a passenger-carrying vehicle manufactured more than 30 years before the date when it is driven and not used for hire or reward or for the carriage of more than eight passengers;
(3) Part IV of the Traffic Act and regulations 54 to 57 shall not apply to a passenger-carrying vehicle when it is being driven by a constable for the purpose of removing or avoiding obstruction to other road users or other members of the public, for the purpose of protecting life or property (including the passenger-carrying vehicle and its passengers) or for other similar purposes.
(4) All classes of large goods and passenger-carrying vehicle to which Part IV of the Traffic Act applies are prescribed for the purposes of section 117(7) and 117A(6) of the Traffic Act.