19 C.F.R. § 123.23 Train sheet for in-transit rail shipments.
Title 19 - Customs Duties
Before an in-transit train proceeding under the provisions of this subpart departs from the United States, the carrier shall furnish to the customs officer at the port of exit a train sheet, sometimes called a consist, bridge sheet or trip sheet, listing each car of the train and specifically identifying the in-transit cars, unless a consolidated manifest containing this information has been presented for a train which will remain intact.
Title 19: Customs Duties
PART 123—CUSTOMS RELATIONS WITH CANADA AND MEXICO
Subpart C—Shipments in Transit Through Canada or Mexico
§ 123.23 Train sheet for in-transit rail shipments.