To identify the shipper, when the shipment does not originate at a rail point.
Free-form organization name or official title as it should appear for mailing address.
U501 will contain the name of the party who originated this shipment on another transportation mode.
If either U502 or U503 is present, then the other is required.
Code designating the system/method of code structure used for Identification Code (67).
Code identifying a party.
Code identifying an organizational entity or a physical location.
