When you file eHBL for co-loaded cargo, do you have to provide both Primary and Previous CCN? Or only Previous CCN is ok?

When you file eHBL for co-loaded cargo, do you have to provide both Primary and Previous CCN? Or only Previous CCN is ok?

Every eHBL transmission must reference the marine carrier’s Primary CCN. Every Close Message must reference the Previous CCN above it, the co-loader’s 8000 CCN.  In a co-load situation, regardless of the number of freight forwarder tiers, every freight forwarder must quote the carrier’s Primary CCN in its eHBL data.  (Co-loaders must communicate quickly and efficiently to ensure the Primary CCN gets to every freight forwarder in the consolidation.) Every Close Message must reference the freight forwarders 8000 Previous CCN above it.