2Annual rates of duty
(1)Vehicle excise duty in respect of a vehicle of any description is chargeable by reference to the annual rate currently applicable to it in accordance with the provisions of Schedule 1 which relate to vehicles of that description.
(2)But where vehicle excise duty is chargeable in respect of the keeping of a vehicle on a road (and not in respect of its use), the duty is chargeable in accordance with subsection (3) or (4).
(3)Where one or more vehicle licences have previously been issued for the use of the vehicle, duty in respect of the keeping of the vehicle on a road is chargeable by reference to the annual rate currently applicable to a vehicle of the same description as that of the vehicle on the occasion of the issue of that licence (or the last of those licences).
(4)In any other case, duty in respect of such keeping is chargeable by reference to whichever of the annual rates currently specified in Part I of Schedule 1 is applicable to a vehicle constructed at the same time as the vehicle.