- Every public service vehicle, other than a motor cab, shall have the following internal height or head-room measured along the centre of the vehicle from the top of the floor boards or battens to the under side of the roof supports -
(i) in the case of a single-decked vehicle with a permanent top, not less than 137 centimetres and not more than 183 centimetres; or
(ii) in the case of a single-decked vehicle with a movable hood, not less than 137 centimetres; or
(iii) in the case of a double-decked vehicle, not less than 178 centimetres for the lower deck and not more than 173 centimetres for the upper deck :