Three Canadian customs developments announced or published between September 23 and October 2, 2026, require different importer responses. The aluminum change is a new data-reporting requirement beginning October 1; the United States Surtax Order (2026) is already effective from September 8; and a small-power-transformer expiry review creates a November 6 questionnaire deadline for affected parties. Treating all three as one tariff update could send the wrong work to the wrong team.
Put each development in a separate control queue
| Development | Relevant date | Primary importer action |
|---|---|---|
| Aluminum smelt and cast reporting | October 1, 2026 | Collect required origin-of-production data and transmit it through the Single Window Initiative Integrated Import Declaration |
| United States Surtax Order (2026) | Effective September 8, 2026; published September 23 | Check origin, tariff classification, schedules and the applicable CARM accounting data |
| Small power transformers expiry review | Initiated October 2, 2026 | Assess whether the goods are subject and whether a questionnaire response is required by November 6 |
The dates and actions in this table come from the CBSA aluminum notice, the Canada Gazette surtax order, the related CBSA surtax notice and the CBSA transformer investigation notice.
October 1: aluminum data becomes an entry-preparation issue
Importers of aluminum goods covered by General Import Permit No. 83 are required to submit the country of largest smelt, the country of second-largest smelt where applicable, and the country of most recent cast through the Single Window Initiative Integrated Import Declaration. The CBSA notice identifies exceptions for certain CSA importers and shipments with a value for duty of $5,000 or less. The requirement applies from October 1, 2026. Source: CBSA Customs Notice 26-15
For an aluminum importer in Mississauga, Brampton or Toronto, the immediate question is not only whether a broker can transmit the declaration. It is whether the supplier can provide the smelt and cast information consistently enough for the entry process. Importers should identify covered products, map the data fields to their commercial-document workflow and establish what happens when a supplier provides incomplete production-origin information.
Customs brokers transmitting declarations are also affected operationally, but the importer remains dependent on upstream product and supplier records. A practical control is to distinguish the three data elements rather than accept a single generic country-of-origin field. The required information describes where aluminum was smelt and cast, not simply the country from which the shipment was dispatched.
September 8: the U.S. surtax requires an entry-by-entry review
The United States Surtax Order (2026) was published in the Canada Gazette on September 23, 2026, but states that it is effective September 8, 2026. It imposes surtaxes of 15%, 25% or 50% on specified goods originating in the United States. The order states that covered goods already in transit to Canada on or before September 8 are excluded. The surtax is calculated on value for duty and applies in addition to ordinary customs duties. Source: Canada Gazette, United States Surtax Order (2026)
The order covers listed tariff items, including products such as appliances, agricultural equipment, pulp and paper and electronics. An importer should therefore avoid applying a blanket rule to every U.S.-supplied purchase order. The relevant review combines the goods’ origin, tariff classification, presence in the order’s schedules and, where relevant, the transit exclusion.
The related CBSA notice requires the applicable surtax code and amount to be reported in the CARM Commercial Accounting Declaration. Importers routing goods through the GTA should make sure their broker instructions and internal entry-review process distinguish U.S. origin from the location of a vendor, consolidator or warehouse. Source: CBSA Customs Notice 26-23
October 2: transformer review is not a new duty rate
On October 2, 2026, the CBSA initiated an expiry-review investigation concerning existing anti-dumping measures on certain small power transformers originating in or exported from Chinese Taipei and South Korea. The Canadian International Trade Tribunal issued the related expiry-review notice on October 1. The review will determine whether expiry of the existing finding is likely to result in continued or resumed dumping. Source: CBSA small power transformer expiry-review notice
The initiation itself does not impose a new duty rate. However, importers of subject transformers should not treat the review as irrelevant to current controls: the published material states that existing trade-remedy obligations may continue during the review. Importers supplying electrical-equipment manufacturers, utilities, contractors or distributors should first determine whether their products fall within the subject goods, then review their recordkeeping and any response obligation.
Questionnaire responses from importers and other parties are due November 6, 2026, by 5:00 p.m. Eastern Time, according to the published schedule. Source: CBSA expiry-review schedule
A workable review sequence for GTA importers
- Start with the calendar. Put October 1, September 8 and November 6 in separate work queues because they represent different types of action.
- Classify the goods before assigning the response. Aluminum reporting depends on covered goods and the applicable permit; surtax depends on listed goods, origin and classification; the transformer matter depends on whether the goods are subject to the existing finding.
- Trace the data to its source. Supplier records are central to aluminum smelt and cast information, while shipment and product records support the U.S.-origin and transit analysis.
- Give the broker an exception list, not only a product description. The list should identify missing aluminum data, uncertain U.S. origin or classification, and transformer entries requiring trade-remedy review.
These developments are best handled as three distinct customs controls: a new declaration-data requirement, an effective surtax assessment and a trade-remedy review. Separating them by date and trigger reduces the risk that an importer in the Toronto area treats a response deadline as a duty change, or treats a new reporting field as a general tariff increase.