Three Section 338 proclamations impose 50% duties on Canadian autos, alcohol and dairy

On 20 July 2026 President Trump signed three proclamations imposing an additional 50 percent ad valorem duty on lists of Canadian motor vehicles, alcoholic beverages and dairy products, effective for goods entered for consumption or withdrawn from warehouse for consumption on or after 12:01 a.m. Eastern Time on 19 August 2026.¹²³ Each proclamation invokes section 338 of the Tariff Act of 1930, 19 U.S.C. § 1338, together with 3 U.S.C. § 301 and § 604 of the Trade Act of 1974, 19 U.S.C. § 2483; Reuters reported the action as the provision’s “first known usage in nearly a century of existence.”⁴⁵ The Office of the United States Trade Representative said the duties would apply to nearly USD 20 billion of imports from Canada — approximately 5.2 percent of the USD 382 billion in US goods imports from Canada in 2025 by US Census Bureau data — and United States Trade Representative Jamieson Greer said in a statement that “Canada, unlike other partners and allies, continues to retaliate against the United States for its efforts to rebalance trade and protect U.S. industry in national-security sensitive sectors.”⁵⁶ Prime Minister Mark Carney said in a statement that “this trade dispute has raised costs for families, particularly in the U.S.” and that “Canada stands ready to engage intensively to address outstanding issues with the U.S. to the mutual benefit of our citizens”; his office’s statement called the new tariffs “the latest in a series of unilateral U.S. trade actions” in “direct violation” of the United States-Mexico- Canada Agreement.⁵⁷ The same day the President signed a proclamation further adjusting Section 232 aluminum duties and an executive order on defense supply chains and domestic acquisition of critical materials; each same-day instrument operates under its own authority and schedule.⁸⁹

1. Section 338(d) supplies both the 50 percent figure and the 19 August effective date. The subsection authorizes duties that “offset such burden or disadvantage, not to exceed 50 per centum ad valorem or its equivalent,” and provides that “thirty days after the date of such proclamation there shall be levied, collected, and paid upon the articles enumerated in such proclamation” the new duties — the three proclamations therefore set the statutory maximum rate on the statutory thirty-day timetable.⁴ Unlike section 301 of the Trade Act of 1974, 19 U.S.C. § 2411, which requires a USTR investigation, and unlike section 232 of the Trade Expansion Act of 1962, 19 U.S.C. § 1862, which requires a Commerce Department national-security investigation, section 338 requires no agency investigation as a precondition (the statute assigns the International Trade Commission an informational role at § 1338(g)): each proclamation states, “pursuant to section 338, I find as a fact that Canada is discriminating” — “in fact,” in the alcohol and dairy proclamations — “against the commerce of the United States,” tracking the § 1338(a)(2) trigger; the motor-vehicles and dairy proclamations additionally recite that Canada’s imposition “is unreasonable, is not equally enforced upon the like articles of every foreign country, and places a burden on the commerce of the United States,” tracking § 1338(a)(1), and the alcohol proclamation tracks § 1338(a)(1) in its own terms, finding Canada “has imposed an unreasonable regulation or limitation” on US alcoholic beverages “while not banning or similarly restricting such products from other countries.”⁴¹³

2. Each proclamation names a specific Canadian measure as the discrimination predicate — each a retaliation instrument from the 2025 tariff exchanges (see Canada, Mexico tariffs paused 30 days). The motor-vehicles proclamation cites Canada’s United States Surtax Order (Motor Vehicles 2025), SOR/2025-118 — the 25 percent surtax on US motor vehicles maintained since 9 April 2025, with tariff-rate quotas allocated per automaker — and recites that US motor- vehicle exports to Canada fell approximately 22 percent (from approximately USD 25.9 billion to approximately USD 20.3 billion) comparing April 2025-March 2026 to the prior-year period, while Canadian imports of motor vehicles from Mexico rose approximately 23.6 percent comparing April 2025-February 2026 to the prior-year period.¹ The alcoholic-beverages proclamation cites the halt by “all Canadian provinces and territories” of purchasing, distribution or retail of US alcoholic beverages beginning March 2025 through the provincial and territorial authorities that control alcohol wholesale, and recites that US alcoholic-beverage exports to Canada fell approximately 81 percent — from approximately USD 718 million to approximately USD 137 million, comparing March 2025-February 2026 to the prior-year period — with only Alberta and Saskatchewan having lifted their halts by June 2025.² The dairy proclamation cites the disparity between Canada’s tariff-rate-quota allocation measures on US cheeses under the USMCA and those on EU cheese under the Canada-EU CETA — reciting that the CETA eligibility criteria grant retailers access to quota quantities while the USMCA criteria do not.³ Reuters reported that most provincial premiers said the US-alcohol purchasing halts would remain in place after the proclamations issued.¹⁰

3. The duties stack on top of existing rates except where the proclamations themselves carve out. Paragraph (2) of each proclamation excludes articles already subject to Section 232 duties and articles (other than unmanned aircraft) covered by the WTO Agreement on Trade in Civil Aircraft, and provides that the new duties are otherwise “in addition to any other duties, taxes, fees, exactions, and charges.”¹ CBC News reported that the duties reach even goods qualifying for CUSMA (USMCA) preferential tariff treatment, since the additional duty operates through the Annex II HTSUS Chapter 99 modifications rather than the preferential column-1 rate.¹¹ Covered products admitted to a US foreign trade zone on or after the effective date (other than domestic-status admissions under 19 CFR 146.43) must enter under privileged foreign status per 19 CFR 146.41.¹ The collection mechanics follow the standard three-instrument chain — the proclamations’ Annex II HTSUS modifications, a CBP Federal Register implementing notice, and CBP CSMS guidance to filers — of which only the Annexes existed as of 22 July 2026; duty exposure attaches on entry on or after 19 August, not on the signing date.¹

4. The statute’s own next step is exclusion, not a higher rate. Section 1338(b) authorizes the President, on a finding that a country “has, after the issuance of a proclamation as authorized in subdivision (a) of this section, maintained or increased its said discriminations against the commerce of the United States,” to direct by further proclamation that covered products “shall be excluded from importation into the United States.”⁴ Carney and President Trump agreed to what Carney described as intensified negotiations in the 30-day window before the duties attach, Reuters and Canadian outlets reported; Trade Representative Greer convened a third round of bilateral USMCA talks with Mexico — without Canada — in Mexico City beginning 21 July and running through 24 July, per USTR.⁵¹⁰