Tractor units used with semi-trailers having only one axle when duty paid by reference to use with semi-trailers having more than one axleU.K.
14(1)This paragraph applies in any case where—
(a)a vehicle licence has been taken out for a tractor unit having two axles which is to be used only with semi-trailers with not less than two axles or for a tractor unit having two axles which is to be used only with semi-trailers with not less than three axles; and
(b)the rate of duty paid on taking out the licence is equal to or exceeds the rate of duty applicable to a tractor unit having two axles—
(i)which has a plated train weight equal to the maximum laden weight at which a tractor unit having two axles may lawfully be used in Great Britain with a semi-trailer with a single axle; and
(ii)which is to be used with semi-trailers with any number of axles.
(2)If, in a case to which this paragraph applies, the tractor unit is used with a semi-trailer with a single axle and, when so used, the laden weight of the tractor unit and semi-trailer taken together does not exceed the maximum laden weight mentioned in sub-paragraph (1)(b)(i) above, the tractor unit shall, when so used, be taken to be licensed in accordance with the requirements of this Act.