19 CFR §18.22

1. (a)Transfer of bonded merchandise to another conveyance. If in-bond merchandise must be transferred to another conveyance at the port of exportation, the procedure will be as prescribed in §§ 18.3 and 18.4(c).
2. (b)Transfer of baggage by express shipment. An express consignment carrier that is bonded as a common carrier and is responsible under its bond for delivery to the CBP officer in charge of the exporting conveyance of articles shown to be baggage in the in-bond record may transfer the baggage by express shipment without a permit from the port director and without the use of a transfer ticket or other CBP formality from its terminal to the exporting conveyance for lading under CBP supervision. The in-bond record must be updated to reflect the name of the owner of the baggage or article and the name of the conveyance transporting the owner of the baggage. See § 18.1.