Is a bill of lading number required at the time of an ISF filing?
Yes. The ISF Importer or his/her agent must obtain this information and provide it to
CBP as part of the ISF. The ISF needs to be submitted at the lowest bill of lading level
(i.e., house bill or regular bill) that is transmitted into ACE. The bill of lading number is
the common link between the ISF and the customs manifest data.