Ports on Canada’s West Coast continue to struggle with severe congestion. Faced with over capacity issues, many cargo shipments bound for US destinations through Canada’s West Coast ports are being diverted to US ports—primarily Seattle and Tacoma. Since this cargo was not initially bound for the US directly, it was not subject to US importer security filing (ISF) requirements. However, cargo being rerouted directly to US ports will be required to submit ISFs prior to US Customs and Border Protection accepting entries and allowing release. These late-filed ISFs will not be counted against importers on-time filing statistics.