The 2026 United States Section 338 tariff escalation on Canadian goods: the operative rate, predicates, and dates, from the primary documents

Current reading, 2026-09-29: five further U.S. proclamations signed September 8 and published in the Federal Register September 14 are now captured with their complete annexes. Proclamations 11061, 11062 and 11063 make narrowly defined Canadian products subject to import exclusion from 12:01 a.m. eastern time on September 29. The named products include specified alcoholic beverages, whey and molasses products, non-alcoholic beer, and the motorcycle tariff line for engines over 800 cc. Proclamations 11064 and 11065 changed the scope of two earlier 50 percent duties from September 15 and expressly apply those amended duties in addition to Section 232 duties. These are legal provisions, not observations of blocked shipments, duties paid, or economic effects. The earlier captured documents and values below are retained as their dated record, not a complete description of the September legal position. Earlier scope, retained: Three presidential proclamations under section 338 of the Tariff Act of 1930, signed 2026-07-20, each imposing an additional 50 percent ad valorem duty on certain products of Canada set forth in that proclamation's own Annex II, on a discrimination predicate specific to each proclamation (alcoholic beverages, dairy, motor vehicles respectively), the section 232 and WTO civil-aircraft exclusions each proclamation states, each proclamation's own Annex I -- named once, in each proclamation's own additivity clause, as a possible exception to the rule that these duties stack with other duties, its contents not in the transcribed prose -- the scheduled-to-actual effective-date divergence a fourth proclamation created, and the Government of Canada's own 2026-08-21 and 2026-08-22 statements of retaliatory intent. This entry follows this record's earlier Resolution on the 2025 United States tariff actions on Canadian goods, and does not edit or supersede it. Extended 2026-08-25 with the Department of Finance Canada's own concretization of Canada's retaliatory intent: the counter-tariff rate schedule (15, 25, and 50 percent, which the government states matches the corresponding U.S. rate for each product), its own $27.6 billion scope figure -- the release's own precise restatement of the earlier 'roughly $28 billion' figure, and, by the same announcement's dollar-for-dollar design, the matching value of the U.S. goods covered by Canada's announced counter-tariff schedule -- a stated effective date of 2026-09-08, and a $7.5 billion support package for tariff-affected workers and businesses, on top of the government's own stated nearly $25 billion in supports over the prior 18 months.