When transmitting multiple Cargo Control Numbers (CCNs) using the IID, there are a number of system rules that must be followed to ensure smooth processing at arrival. Some of the system rules are detailed in the IID ECCRD, page 25:

Reporting of Multiple Cargo Control Numbers (CCNs)

The IID allows a single EDI release transaction to contain multiple Cargo Control Numbers (CCNs). The business rules for reporting multiple CCN(s) on the IID are as follows:

1. A minimum of one CCN must be referenced on the IID.
2. If the IID is submitted with a single CCN, the single CCN must be referenced at the Declaration level of the IID.
3. If the IID is submitted with multiple CCNs, the CCNs must be reported at the Invoice level of the IID.
4. All CCNs referenced on an IID must be non-consolidated documents.
5. All CCNs referenced on an IID submitted pre-arrival must arrive at the First Point of Arrival in the same conveyance.
6. If one CCN on the IID is referred for further processing or examination by the CBSA, the entire release and all CCNs associated to the IID will be referred.

Please note, all CCNs referenced on the IID that have been transmitted must be in “arrived” status, before the IID will be eligible for release. Also note, the maximum allowable CCNs referenced on the IID is 999. IID limitations are similar to RMDs, with the exception IID can be transmitted pre-arrival with multiple CCNs.

For each CCN referenced on the IID, a corresponding cargo document must be transmitted, unless otherwise exempt. Only one shipper and consignee can be transmitted per cargo document. For each unique consignee or shipper, a separate cargo document is required.