Two late-May regulatory and filing updates affect how Canadian importers document origin and report aluminum shipments. Both trace back to public Government of Canada sources, with the aluminum change relayed through a Canadian Society of Customs Brokers (CSCB) member bulletin. Here is what importers should be watching.
Revised MFN Rules of Origin: Memorandum D11-4-3
CBSA updated Memorandum D11-4-3 — Rules of Origin Respecting the MFN Tariff in Ottawa on May 29, 2026. The memorandum explains how goods qualify for Most-Favoured-Nation tariff treatment:
- At least 50% of the production cost must occur in MFN beneficiary countries or Canada;
- The goods must be finished in a beneficiary country; and
- Proof of origin must support direct shipment to Canada.
The latest revision reflects changes to the shipping requirements — the direct shipment and transhipment rules — for MFN purposes, superseding the long-standing 2013 version.
Practical impact: Importers relying on MFN rates should re-confirm their origin and shipping documentation against the updated rules. Tightened direct-shipment and transhipment language can affect whether goods routed through third countries still qualify, so verifying paperwork now protects both tariff classification and origin claims.
New Aluminum Import Monitoring: Country of Smelt and Cast
Global Affairs Canada is adding Country of Smelt and Cast reporting to the Aluminum Import Monitoring Program, effective October 1, 2026. Importers of applicable aluminum goods will need to report the country of largest smelt, the country of second largest smelt, and the country of most recent cast. The data will be collected by CBSA through the Single Window Integrated Import Declaration (SW IID) system.
The CSCB relayed these details in Commercial Client Bulletin TCC26-0107, noting accompanying changes to the SW IID regulated-commodities data-element matching criteria for clients and service providers transmitting IID data via EDI.
Practical impact: Importers and EDI filers must capture and transmit additional origin data on aluminum shipments. Systems, master data, and broker instructions should be updated well before the October 1, 2026 deadline to avoid rejected declarations.
What importers should do
Importers using MFN rates should re-verify origin and direct-shipment documentation against the revised D11-4-3, while aluminum importers and EDI filers should begin updating systems and master data ahead of the October 1, 2026 smelt-and-cast reporting requirement. NGB can help assess how each change affects your specific import program.
