Section 18

Where the owner of a vehicle, the owner or master of a vessel or the captain of an aircraft is convicted of an offence under this Act and ordered to pay a fine relating to that vehicle, vessel or aircraft, the court may, in addition to any other power which it may have for the purpose of compelling payment of the fine, direct that the vehicle, vessel or aircraft be detained until the payment thereof and in default of payment within the time directed the court may order the fine to be levied by sale of said vehicle, vessel or aircraft or by such other means as the court shall direct.