Even though there is only one house bill, the CBSA considers a back-to-back shipment to be consolidated, because there is at least one house bill. Therefore, there must be an eHBL and Close Message. The railroad / marine terminal must subscribe to the CBSA Notices and particularly to the D4 Deconsolidation Notice. The railroad / marine terminal handles the 9000-manifest exactly as it does today. No system or other changes. When the shipment is “Arrived” / WACM by the railroad / marine terminal on the 9000 Primary CCN and when the 8000 CCN is Customs released, the D4 Deconsolidation Notice cascades and the shipment is ‘authorized to move’. [Note: Both CN and CP advise they are fully capable of receiving D4 Deconsolidation Notice messages.]