495. Where for the purposes of this Ordinance any document is to be served on any person, that document may be served- (a) in any case, by delivering a copy thereof personally to the person to be served, or by leaving the same at his last place of abode; (b) if the document is to be served on the master of a ship, where there is one, or on a person belonging to a ship, by leaving the same for him on board that ship, with the persons being or appearing to be in command or charge of the ship; and (c) if the document is to be served on the master of a ship where there is no master and the ship is in Bangladesh, on the managing owner of the ship, or, if there is no managing owner, on some agent of the owner residing in Bangladesh, or where no such agent is known or can be found, by affixing a copy thereof to the mast of the ship