Canadian Supply Chain Rules and Regulations: Latest Changes for Importers
October 15, 2026 | ATN Trade & Finance
2026 has been one of the busiest years in recent memory for Canadian customs compliance. New forms, new aluminum data requirements, new surtaxes, and a pending valuation overhaul mean importers face a substantially different compliance environment than a year ago. Here is what has changed and what still requires attention.
CARM: The CAD Replaces Legacy B3 and B2 Forms
The most systemic change in Canadian customs in years is now live. CBSA's CARM Release 3 replaced the legacy B3-3 and B2 forms with the Commercial Accounting Declaration (CAD) as the standard accounting document. Guidance was updated in a revised D11-6-8 memorandum on September 9, 2026. Importers who haven't already updated internal templates, broker instructions, and compliance records to reflect CAD data fields should do so immediately — origin verification, tariff classification, and value-for-duty records must reconcile to the new format.
Aluminum: New Origin Data Required Since October 1
Effective October 1, 2026, importers of aluminum products under Global Import Permit No. 83 (GIP 83) must provide three new data fields to CBSA at time of entry: the Country of Largest Smelt (CLS), the Country of Second-Largest Smelt (C2S), and the Country of Most Recent Cast (CRC). This is Canada's move toward supply-chain-level traceability for primary aluminum. Exceptions apply for Customs Self-Assessment importers (for goods under s.32(2)(b) of the Customs Act) and for shipments with a total value for duty of CAD $5,000 or less. Importers should confirm their suppliers can provide smelt and cast country data, and update purchase-order and broker-instruction fields accordingly (Customs Notice 26-15).
Wood Cabinet and Vanity Surtax: 25% Since July 31
A 25% provisional safeguard surtax on specified wood cabinets, vanities, and subassemblies took effect July 31, 2026 (Customs Notice 26-17). The surtax can run up to 200 days. Importers should classify affected goods by exact listed tariff items — not by broad product descriptions — and review open purchase orders and bonded inventory for exposure.
"Last Sale" Valuation: Proposed, Not Yet Law
CBSA's proposed shift from a first-sale to a last-sale customs valuation method — which would base duty assessments on the final sale price to Canadian buyers — completed its consultation period in January 2026. It is not yet in force, but if adopted, it would significantly raise declared values and duty payments across multi-tier supply chains. Importers with complex import structures should begin reviewing valuation methods now and consider seeking advance rulings.
CBSA's 2026 Compliance Verification Priorities
The CBSA's published verification list for 2026 targets: supply-managed goods (frozen desserts, dairy products, spent fowl), steel and aluminum surtax compliance on Chinese and US-origin goods, CUSMA automotive origin claims, GST exemption codes, vaping products, and tariff classification of gloves, bags, and LED lamps. Misclassification on supply-managed goods can trigger over-access tariffs reaching 300%.
UK Goods Now Eligible for CPTPP Treatment
As of September 1, 2026, eligible goods from the United Kingdom, Channel Islands, and Isle of Man qualify for CPUKT tariff treatment under Canada's CPTPP commitments (Customs Notice 26-22). Updated T2026-2 tariff files were released September 16.
What this means for importers: The compliance burden in Canada is at a multi-year high. The CARM transition, the new aluminum data mandate, the wood cabinet surtax, and active CBSA verification programs are all running simultaneously. Businesses relying on 2025 procedures or broker instructions should audit them now.
Sources:
- Canada to Require Smelt and Cast Country Reporting for Aluminum Imports Beginning October 1, 2026 — Buckland
- CBSA 2026 D-Memorandum Revisions and Customs Notices Explained — Logistic North
- 2026 Canadian Trade & Customs Outlook — Baker McKenzie / Global Import Blog
- CBSA's Proposed "Last Sale" Rule — C.H. Robinson