must be produced to him, a nd a copy thereof lodged with him. Within the same time the master shall make report to the collector; and if any part of the cargo was unladen from necessity or lost by casualty before arrival, and such fact is made to appear by sufficient proof to the collector of customs, he shall give h is approbation and the unlading shall be deemed to have been lawfully effected. [355-101, 104, 357.] SECTION  1389 . Unlading of Vessel in Port from Necessity . — If the situation is such as to require the unlading of the vessel pending sojourn in port, the collector of customs shall, upon sufficient proof of the exigency, grant a permit therefor, and the me rchandise shall be unladen and stored under the supervision of the customs authorities. At the request of the master of the vessel, or of the owner thereof, the collector may grant permission to enter and pay the duties on and dispose of such part of the cargo as may be of perishable nature or as may be necessary to defray the expenses attend ing the vessel. Upon departure, the cargo, or the residue thereof, may be reladen on board the vessel, and the vessel may proceed with the same to her destination, subject only to the charge for storing and safe-keeping of the merchandise and the fees for entrance and cle arance. No port charges shall be collected on vessels entering through stress of weather or other causes above described. [355-183, 357.] SECTION  1390 . Clearance of Vessel for Foreign Port . — Before a clearance shall be granted to any vessel bound to a foreign port, the master, or other proper agent thereof, shall present to the collector of customs the following properly authenticated docum ents: Clearance of Vessels in Foreign Trade ARTICLE  VI ( a ) bill of health from the proper quarantine official or officer of the public health service in the port. ( b ) Three copies of the manifest of export cargo, one of which upon Copyright 2012 CD Technologies Asia, Inc. and Accesslaw, Inc. Philippine Law Encyclopedia 2011 408