What happens when you have multiple containers that arrive via rail and manifested in one arrival notice and only one container arrived at destination and the other is still at the port of discharge?

What happens when you have multiple containers that arrive via rail and manifested in one arrival notice and only one container arrived at destination and the other is still at the port of discharge?

If all of the containers on one master bill of lading / 9000 CCN have been Reported as being in Canada by the carrier with a CACM, the CBSA advises that the railroad Arrival (WACM) of the first container will Arrive all of the containers and, depending on the release status of the shipment, will trigger the D4 Deconsolidation Notice.