CBSA’s 2026 revisions and customs notices do not all create a new obligation on the date they are published. Some notices establish a tariff or surtax effective date. Some D-Memoranda document an existing CARM process. Others update policy or forms without stating a separate future effective date. For importers in Toronto, Mississauga and Brampton, separating those categories is important when deciding which entry instructions, documents and accounting controls apply to a shipment.
Three dates that should not be treated as interchangeable
A CBSA publication can contain at least three different timing concepts:
- Publication or revision date: the date a notice or D-Memorandum was issued or revised.
- Underlying effective date: the date a surtax, tariff treatment, tax suspension or reporting process applies.
- Operational implementation date: the point at which a carrier, broker, warehouse or importer begins using a revised process.
For example, D11-6-8 was revised on September 9, 2026 to reflect CARM Release 3 and the Commercial Accounting Declaration, but the memorandum does not state a separate future effective date. That is different from the United States Surtax Order, for which CBSA identifies September 8, 2026 as the effective date for covered goods under Customs Notice 26-23.
A shipment review that records only the date a page was downloaded can therefore produce the wrong result. The entry file should identify the rule being applied, the date relevant to that rule and the evidence supporting the decision.
Updates with a direct tariff or tax consequence
U.S.-origin goods
Certain U.S.-origin goods became subject to surtax rates of 15%, 25% or 50%, depending on the product, effective September 8, 2026. The measure can apply when the goods are shipped to Canada from a third country and can also apply to shipments below de minimis thresholds. CBSA states that proof of origin is required, and goods in transit to Canada on September 8 may be exempt where the importer can prove their status. The surtax is accounted for through the Commercial Accounting Declaration in CARM. These points appear in Customs Notice 26-23.
Importers should discuss whether their commercial invoice, supplier records and transport documents can establish origin and in-transit status where relevant. A routing record showing that a shipment departed the United States is not, by itself, the same thing as proof of origin.
United Kingdom preferential tariff treatment
Eligible goods from the United Kingdom, the Channel Islands and the Isle of Man became eligible for the Comprehensive and Progressive United Kingdom Tariff, using tariff treatment code 35, effective September 1, 2026. CBSA published the T2026-2 tariff files on September 16, 2026. The September 16 file publication does not change the stated September 1 tariff-treatment date. Importers should review classification, origin documentation and the applicable rate before accounting. The treatment and implementation details are set out in Customs Notice 26-22 and the 2026 Canadian Customs Tariff files.
Provisional safeguard surtaxes
Specified wood cabinets, vanities and subassemblies became subject to a provisional safeguard surtax of 25% of value for duty on July 31, 2026. The measure was initially for up to 200 days and is subject to the Canadian International Trade Tribunal process. The surtax is additional to other duties and taxes unless a specific exemption or relief applies. See Customs Notice 26-17.
Specified canned vegetables, including certain corn, peas, beans, mixed vegetables and chickpeas, became subject to a provisional safeguard surtax of 10% of value for duty on June 19, 2026. That measure was also described as applying for up to 200 days unless ended earlier or replaced following the Tribunal inquiry. See Customs Notice 26-14.
Revisions that change the control record rather than the duty rate
CAD and verification records
The revised D11-6-8 concerns CBSA verification of non-free-trade-agreement origin, tariff classification and value for duty. Its CARM references and replacement of Forms B3-3 and B2 with the Commercial Accounting Declaration affect how a verification file may describe accounting records and corrections. Importers subject to verification should discuss whether their internal records can connect the commercial transaction, origin support, classification analysis and value-for-duty information to the relevant CAD.
Fuel excise coding
D18-5-1 was revised on June 30, 2026 to reflect the temporary suspension of federal fuel excise tax. The related guidance states that the suspension continues through January 31, 2027; 50% of regular rates apply from February 1 through March 31, 2027; and full rates return on April 1, 2027. Qualifying imported unleaded gasoline, aviation gasoline, diesel, aviation fuel and leaded aviation gasoline use excise exemption code F00 on the applicable CARM Commercial Accounting Declaration. The extension is also described in Customs Notice 26-11.
For a fuel importer, the control is not simply “use the revised memorandum.” The accounting team and broker should confirm the product scope, the date of importation and the code transmitted on the CAD.
Warehouse licensing and trailers
D4-1-4 was revised on July 6, 2026 to include Customs Sufferance Warehouse Enrolment Form BSF897 and CARM Client Portal procedures. It states that CBSA aims to decide complete licence applications within 60 business days. This is relevant to sufferance-warehouse applicants and operators, carriers and freight forwarders using bonded or sufferance facilities, including those supporting GTA distribution through Mississauga and Brampton.
D10-14-24 was revised on July 9, 2026 for the classification policy covering non-commercial snowmobile, utility and boat trailers. The update includes policy amendments concerning tariff item 8716.39.30 and states that non-commercial trailers are generally directed to tariff item 8716.39.90. Dealers and distributors should discuss whether existing classifications and rulings remain appropriate.
What to review with a broker
A practical review can be organized around the shipment’s relevant date rather than the date an update was found:
- Identify whether the goods fall within a measure with a stated effective date, such as the U.S.-origin surtax, UK tariff treatment or a provisional safeguard surtax.
- For origin-based measures, preserve origin evidence and, where relevant, evidence that goods were in transit on the stated effective date.
- For CAD-based accounting, confirm that classification, value for duty, origin, surtax treatment and any exemption code are consistent across the entry file.
- For fuel, confirm the applicable period and whether code F00 is supported for the imported product.
- For warehouse, trailer, firearm or rail movements, determine whether the update affects the facility, classification or transport process rather than the duty rate.
Other updates in the same period include revisions to D19-13-2 for firearms, weapons and devices, an amendment to the tariff description for tariff item 8507.60.20 effective August 6, 2026 under Customs Notice 26-21, and clarified rail in-transit reporting for movements through the United States under Customs Notice 26-16. Importers should raise those topics with their broker when their products or transport arrangements fall within the stated scope.
The main compliance question is therefore not simply whether a D-Memorandum was revised. It is which part of the importer’s process changed, when that change applied, and what records demonstrate that the CAD, classification, origin, tax code or movement report was prepared on that basis.