Vehicles to which section 15(3) and (3A) of the Act do not apply
9. The following classes of vehicles are exempt from the prohibition in section 15(3) and (3A) of the Act, that is to say—
(a)vehicles which are neither motor cars nor passenger cars;
(b)licensed taxis and licensed hire cars in which (in each case) the rear seats are separated from the driver by a fixed partition.