504. Issue of a 'shipped' bill of lading.

After the goods1 are loaded, the bill of lading to be issued by the carrier2, master or agent of the carrier to the shipper3 must, if the shipper so demands, be a 'shipped' bill of lading4. If, however, the shipper has previously taken up any document of title to such goods, he must surrender the same as against the issue of the 'shipped' bill of lading, but, at the option of the carrier, such document of title may be noted at the port of shipment by the carrier, master or agent with the name or names of the ship