On this Terms and Conditions "we", "our" and "us" refer to World Courier-Express, its subsidiaries and branches and their respective employees, agents and contractors. "You", "your" and "yours" refer to the shipper, its employees, and customers and to all others with an interest in the shipment. "Shipment" means any container or envelope which is tendered to and accepted by us for delivery on a single Air Waybill.