(1) Where this Act requires anything to be done by the person in charge of a conveyance, it may be done on his behalf by his agent.
     (2) An agent appointed by the person in charge of a conveyance and any person who represents himself to any officer of customs as an agent of any such person in charge, and is accepted as such by that officer, shall be liable for the fulfilment in respect of the matter in question of all obligations imposed on such person in charge by or under this Act or any law for the time being in force, and to penalties and confiscations which may be incurred in respect of that matter.