Section 81
SEC. 81. The master, consignee, or agent must on making entry of the vessel deliver to the collector all of the original manifests covering all of the cargo, passengers, immigrants and their baggage on board of his vessel, and when a manifest for the port at which he may then be shall be produced to the collector, not certified by the boarding officer, he shall make oath that no officer has demanded or indorsed a manifest of the vessel. The manifest so produced shall t in no case he changed or altered, except by means of a post entry which shall be made by the master, or, if the vessel has sailed, by the agent thereof, under oath, and attached to the original entry, and by previously granted permission by the collector.