Alterations in conditions on which licence is issued

(1) Where the holder of a motor vehicle or trailer licence desires to use the motor vehicle or trailer for a purpose not authorised by the licence, he shall apply for a new licence, and where after the issue of a licence, a motor vehicle or trailer is altered so that a higher duty or a duty of a different class is required, the licence shall become void, and the holder shall apply for a new licence. (2) In such cases a new licence shall not be issued until the old licence has been surrendered, and there shall be deducted from the duty on the new licence a sum equal to the duty which would have been payable on the old licence, if issued on the same day as the new licence, but the minimum duty on the new licence shall be one dollar. (3) Where a new licence is issued in the circumstances referred to in this section, the transport officer shall duly amend the records and issue a new certificate of registration.