What is a “shipment”?
A shipment is all merchandise being sent from one exporter (U.S. principal party in interest) to one consignee in a single country of destination on a single carrier. A single carrier is an individual vessel, plane, truck, or rail car, not a steamship line or airline. For overland exports the Customs Director may accept a single declaration for multiple car shipments moving under a single bill of lading and cleared simultaneously.