58. (1) For the purpose of securing compliance with any provision of this Act or the rules or any other law, the appropriate officer may at any time, while the vessel is within the limits of any port or any other conveyance is within the limits of any station or airport or within Bangladesh territory, demand the return of port-clearance or the written permission for departure, as the case may be. (2) Any such demand may be made in writing or may be communicated to the person-in-charge of the conveyance by wireless, and if made in writing it may be served- (a) by delivering to the person-in-charge or his agent personally; or(b) by leaving it at the last known place of abode of such person or agent; or(c) by leaving it on board the conveyance with the person appearing to be in charge or command thereof. (3) Where a demand for the return of a port-clearance or of a permission for departure is made as aforesaid, the port-clearance or permission shall forthwith become void.