Canadian Supply Chain Rules and Regulations: Latest Changes for Importers
October 14, 2026 | ATN Trade & Finance
The Canada Border Services Agency has issued a run of notices, memorandum revisions, and new reporting requirements in 2026. Here is a current-state summary of what has changed and what importers need to act on.
Aluminum Origin Reporting — Effective October 1
The most recent compliance deadline hit two weeks ago. As of October 1, 2026, importers of aluminum products covered under GIP 83 must declare three new data fields at entry through the Single Window Initiative Integrated Import Declaration (IID): the Country of Largest Smelt (CLS), the Country of Second-Largest Smelt (C2S) where applicable, and the Country of Most Recent Cast (CRC). These requirements flow from Customs Notice 26-15 and apply regardless of where the aluminum was last processed — the smelt and cast origin must be traced back through the supply chain.
Exemptions exist for CSA-certified importers releasing goods under paragraph 32(2)(b) of the Customs Act, and for shipments with a total value for duty of CAD $5,000 or less. Importers who have not yet confirmed their supplier data for these fields should treat this as urgent.
CARM Release 3: New Accounting Documents
The shift to CARM (CBSA Assessment and Revenue Management) continued with D11-6-8, revised September 9. The updated memorandum replaces the legacy B3-3 and B2 forms with the Commercial Accounting Declaration (CAD) as the primary instrument for accounting and verification. Importers using brokers should confirm that legacy form references have been removed from internal templates and that CAD data elements are being tied properly to invoices, classification records, and value-for-duty documentation.
Wood Cabinets and Vanities Surtax
A 25% provisional safeguard surtax on specified wood cabinets, vanities, and subassemblies took effect July 31 (Customs Notice 26-17) and may remain in place for up to 200 days. Importers with open purchase orders or bonded inventory in these categories should review tariff item coverage carefully — the notice applies to specific HS codes, not to product descriptions broadly.
UK Goods Now Eligible for CPTPP Rates
From September 1, 2026, goods originating in the UK, Channel Islands, and Isle of Man became eligible for CPUKT treatment under the CPTPP (Customs Notice 26-22). Updated T2026-2 tariff files were available from September 16. Importers sourcing from the UK should confirm qualification and hold supporting origin documentation before applying the preferential rate.
The Proposed "Last Sale" Valuation Rule
Separate from the notices above, CBSA's proposed amendment to customs valuation methodology — shifting the basis for duty assessment from the first sale to the last sale price — drew significant industry concern earlier this year. The comment period closed January 23. If finalized, the rule would raise declared values and duty payments for importers using multi-tier supply chains. No implementation date has been set, but affected importers should be modeling the cost impact now.
What this means for importers: October 1's aluminum origin requirements are in effect — the compliance gap is immediate for any aluminum importer who has not yet updated IID submissions or confirmed smelt and cast data from suppliers. The CARM CAD transition, wood cabinet surtax, and UK CPTPP eligibility each require broker and classification reviews. The "last sale" valuation proposal remains the most significant structural cost risk on the horizon.
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