Each house bill within the chain of cargo control must contain the primary CCN, a mandatory data element.  Each house bill close message must contain the previous CCN and the related house bill numbers.

Primary Cargo Control Number (CCN):

• The CCN of the Cargo Control Document that was used to report [section 12(1) of Customs Act] the goods at the First Point of Arrival (FPOA).
• For freight forwarders, this is the marine, air, highway, or rail carrier’s CCN.
• This is a mandatory data element on the electronic house bill submission.

Previous Cargo Control Number(CCN):

• The CCN of the Cargo Control Document immediately preceded the document in question in the chain of cargo control.
• This is a mandatory data element on the House bill close message.
• Represents either a consolidated primary cargo or a consolidated house bill