All requirements such as US AMS and ISF 5 filing must be met as usual. If a shipment arrives in Canada via a US port, the Primary CCN (and likely the Previous CCN on the Close Message as one container per manifest) will be the Rail or Highway carrier CCN. The freight forwarder whose 8000 is used to transmit the eHBL and Close Message is responsible to file, within those modal timeframes. Electronic changes to these eHBL data can be made easily in such cases.