The United States has responded to the counter-tariffs Canada imposed at 12:01 a.m. on September 8, 2026. On the evening of September 8, the President signed five proclamations under section 338 of the Tariff Act of 1930, the same authority behind the 50% duties in force on Canadian goods since August. They were published in the Federal Register on September 14. Two change which Canadian goods pay the 50% duty; three go further and bar certain goods from entering the United States at all.
From September 15: the 50% duty list changes
Proclamations 11064 (alcoholic beverages) and 11065 (motor vehicles) amend the scope of the July section 338 proclamations. Each annex has two parts: goods that are now subject to the additional duty, and goods that no longer are. The changes apply to goods entered, or withdrawn from warehouse, for consumption on or after 12:01 a.m. eastern time on September 15, 2026, and neither proclamation provides an in-transit exception. CBC News reported that about 110 products were added, including aluminum products, paper and wood products, iron or steel beams, electric lamps and mattresses, while about 10 were removed, including salt, sugar, cement, switchboards and toilet paper.
From September 29: import bans
Proclamations 11061 (alcoholic beverages), 11062 (dairy) and 11063 (motor vehicles) exclude certain Canadian goods from importation into the United States. These goods currently pay the 50% duty; the ban applies to goods imported on or after 12:01 a.m. eastern time on September 29, 2026. Goods imported before then but not yet entered for consumption remain subject to the 50% duty rather than the ban. CBC News described the banned goods as certain Canadian dairy, motorcycles and some alcohol products.
Practical impact: exporters should check their U.S.-bound goods against the annexes to all five proclamations now, not the earlier lists. Goods newly added on September 15 already carry the 50% duty at U.S. entry. Shipments of goods covered by the bans need to be imported into the United States before September 29 to be accepted, at the 50% rate. These are U.S. import measures; Canada’s own counter-tariffs on U.S. goods, set out in Customs Notice 26-23, are unchanged.
Proclamation 11064 (alcoholic beverages, scope) · Proclamation 11065 (motor vehicles, scope) · Proclamation 11061 (alcohol ban) · Proclamation 11062 (dairy ban) · Proclamation 11063 (motor vehicles ban) · CBC News, September 15
