Section 338 Canada Retaliatory Duties

Section 338 of the Tariff Act of 1930, codified at 19 U.S.C. § 1338, empowers the President to impose duties on the imports of a foreign country to offset the burden or disadvantage arising from that country's discrimination against, or unequal imposition on, the commerce of the United States. It sat effectively dormant for decades with no modern use — until July 20, 2026, when three proclamations were signed against Canada on a single day and published July 23. They were originally scheduled to take effect August 19, 2026; Proclamation 11056 (91 FR 54789) suspended that start by three days, so the duties actually took effect at 12:01 a.m. eastern time on August 22, 2026.

The three actions are separate, and the distinction matters more than it might appear. Proclamation 11046 answers the provincial and territorial halt on purchasing, distributing and retailing US alcoholic beverages, which began in March 2025 and cut Canadian imports of US alcohol by roughly 81 percent — from approximately $718 million to approximately $137 million. Proclamation 11047 answers Canada's administration of its cheese tariff-rate quotas under the USMCA and under the Canada-European Union Comprehensive Economic and Trade Agreement; by making retailers ineligible to use the USMCA cheese TRQ, Canada discriminated against US goods. Proclamation 11048 answers the motor-vehicle grievance.

Each of the three imposes an additional 50 percent ad valorem duty — the full statutory cap — on its own annexed list of Canadian goods. The lists are different, and reading the proclamation titles as a description of the goods they tax is the single most common way to get Section 338 wrong: the Motor Vehicles proclamation was originally named for the Canadian grievance it answers, not for a vehicle-heavy annex — its original annex held no passenger-vehicle or vehicle-parts line at all, because every article already subject to Section 232 duties was excluded from Section 338. That changed on September 15, 2026: Proclamations 11064 and 11065 (91 FR 58331, 91 FR 58339) added two passenger-vehicle lines to the Motor Vehicles annex and narrowed the Section 232 exclusion to the dairy annex alone, so those two vehicle lines and the rest of the alcohol and motor-vehicle-grievance annexes now pay Section 338 on top of Section 232 where it applies (CBP CSMS #69851916).

For importers, Section 338 introduces something genuinely new to this site's model: it is the first authority that a USMCA preference claim does not defeat. A qualifying Canadian wine shipment that paid nothing on August 21, 2026 owed 50 percent from August 22.

Section 338 of the Tariff Act of 1930 (19 U.S.C. § 1338) allows the President to respond to foreign discrimination against United States commerce "by specifying and declaring additional duties not to exceed 50 percent ad valorem (or its equivalent) and not to take effect earlier than 30 days after the President's proclamation." Both limits shaped what happened here: all three Canada proclamations use the full 50 percent cap, and all three take effect on the earliest date the statute permits.

The duties are implemented through three new HTSUS headings in subchapter III of chapter 99: 9903.03.12 for the alcoholic-beverage annex, 9903.03.13 for dairy, and 9903.03.14 for the motor-vehicle-grievance annex. A fourth heading, 9903.03.15, carries the exclusions and reads "No change" — goods falling within it pay no Section 338 duty. All four are governed by U.S. note 51, created by Annex II of Proclamation 11046 and amended by the other two.

U.S. note 51 does the legal work that makes Section 338 unusual. Subdivision (a) provides that products subject to the additional duty "shall also be subject to the general rates of duty imposed under subheadings in chapters 1 to 97" and to any additional duty provided for elsewhere in chapter 99 — establishing additivity to both MFN and Section 301. It then provides that products "eligible for special tariff treatment under general note 3(c)(i) to the tariff schedule", which is the route a USMCA claim takes, "shall be subject to the additional ad valorem rate of duty imposed by this heading". The Rates of Duty 1-Special subcolumn confirms it in plain text: "The duty provided in the applicable subheading + 50%", identical to the 1-General column.

There is no importer-facing exclusion process. Section 338 authorizes the President to suspend, revoke, supplement or amend the action, and the United States Trade Representative holds delegated approval authority under 19 U.S.C. 1338(h), but no petition mechanism of the kind familiar from Section 232 or Section 301 was created.

There is one Section 338 rate: an additional 50 percent ad valorem. It is the same across all three proclamations. There are no tiers, no country bands, no company-specific reductions, no tariff-rate quota, no de minimis threshold and no quota mechanic of any kind. An importer either has a good on one of the annexes or does not.

The duty applies to goods entered for consumption, or withdrawn from warehouse for consumption, on or after 12:01 a.m. eastern time on August 22, 2026 — Proclamation 11056 (91 FR 54789) delayed the originally proclaimed August 19 date by three days. Goods entered before that moment are unaffected. Because entry timing rather than shipment or order date controls, importers with Canadian goods in transit in late August 2026 should confirm the exact entry date with their broker.

There is no sunset. The modifications continue in effect unless the action is expressly reduced, modified or terminated. This distinguishes Section 338 sharply from Section 122, whose 150-day statutory limit ran out on July 24, 2026 without further action.

Antidumping and countervailing duties are unaffected: products provided for in headings 9903.03.12 through 9903.03.16 "shall continue to be subject to antidumping, countervailing or other duties, taxes, fees, exactions and charges." Goods for personal use in accompanied baggage are outside the duty, as is most chapter 98 treatment, with the exception of goods entered under subchapter XXIII of chapter 98 and under subheadings 9802.00.40, 9802.00.50, 9802.00.60 and heading 9802.00.80. Goods admitted to a foreign trade zone on or after the effective date must be admitted in privileged foreign status.

This site prices Section 338 on wine and spirits only, and it is worth being explicit about why, because the gap between what the proclamations cover and what a calculator can responsibly price is unusually wide here.

Proclamation 11046's annex enumerates the great majority of HTS 2203 through 2208 — beer made from malt, wine of fresh grapes, vermouth, cider and other fermented beverages, undenatured ethyl alcohol for beverage purposes, and the full range of spirits including whiskies, rum, gin, vodka, tequila, brandy and liqueurs. From September 15, 2026 the whisky and liqueur lines were refined to ten-digit precision (Proclamation 11064 Part A and Part B, 91 FR 58331). That maps cleanly onto a product category this site already carries, so wine and spirits is priced; roughly half of the annex's lines carry a "Packaged" scope limitation that matters once a good is banned rather than taxed (see the ban note below). The same annex also reaches a non-alcohol tail — essential oils of grapefruit, certain wood articles, plaiting materials, paper and some sporting goods, plus, from September 15, 2026, cheeses, hides, furskins and vessels — none of which does this site price.

Dairy is genuinely in scope. Proclamation 11047's annex covers HTS 0402 milk and cream, concentrated, in powder, granules or other solid forms, tiered by fat content, plus, from September 15, 2026, additional cheese and dairy-adjacent lines moved onto the alcohol and motor-vehicle-grievance headings by Proclamations 11064 and 11065. This site carries no dairy product category, so it does not price the duty. That is a coverage gap, stated rather than hidden.

Motor vehicles and their parts were, until September 15, 2026, excluded categorically. HTSUS U.S. note 51(c), implemented through heading 9903.03.15, lists as "No change" all articles of steel, aluminum and copper and their derivatives; passenger vehicles, sport utility vehicles, crossover utility vehicles, minivans, cargo vans and light trucks; parts of passenger vehicles and light trucks; wood products; medium- and heavy-duty vehicles and buses; medium- and heavy-duty vehicle parts; semiconductor articles; and patented pharmaceutical articles. Civil-aircraft articles meeting General Note 6, other than unmanned aircraft, remain excluded under subdivision (d). From September 15, 2026, Proclamations 11064 and 11065 narrowed that carve-out to the dairy heading (9903.03.13) alone — CBP CSMS #69851916 confirms only goods under 9903.03.13 may still claim it — and Proclamation 11065's Part A added two passenger-vehicle lines, 8703.10.50 and 8703.21.01, to the motor-vehicle-grievance annex. A Canadian vehicle classified under either line now pays its Section 232 duty and the Section 338 duty on top of it; every other motor vehicle and vehicle part named in the note 51(c) list above is still outside every Section 338 annex and pays no Section 338 duty. This site does not price passenger vehicles under Section 338.

The Proclamation 11048 annex, in place of vehicles, reaches a broad and deliberately diffuse basket: natural honey, animal products, bulbs and cut flowers, textiles, glass, jewellery, hand tools, appliances and consumer electronics, vessels, furniture and lighting, toys and sporting goods, and fine art, antiques and collectors' pieces — and, from September 15, 2026, aluminium bars and tubes, structural steel, switchboard parts, mattresses, lighting fixtures and additional paper and hardware lines (Proclamation 11065 Part A). Those are individual eight-digit lines spread across roughly 60 HTS chapters, which do not align with this site's whole-chapter product categories. Rather than imply per-category precision it does not have, the site makes no Section 338 claim beyond wine and spirits.

Section 338 is additive to everything. Clause 2 of each proclamation states that the duties "are in addition to any other duties, taxes, fees, exactions, and charges applicable to such products", and U.S. note 51(a) confirms it twice over: covered products remain subject to the general chapter 1 to 97 rates, and to any additional duty provided for in chapter 99 subchapter III or subchapter IV. So a Section 338 duty stacks on top of MFN and on top of Section 301, including the forced-labor Section 301 duty.

The current stacking formula is MFN + max(S122, S232, Bilateral) + country-specific Section 301 (the China lists, or Brazil at 25%) + forced-labor Section 301 (if covered) + Section 338 (Canada only, from August 22, 2026). Section 338 is a distinct additive term — it does not enter the max() comparison, and it does not replace any other layer.

The interaction that matters most is with USMCA. Every other authority this site models treats a USMCA-qualifying good as duty-free. Section 338 does not. U.S. note 51 expressly subjects goods eligible for special tariff treatment under general note 3(c)(i) to the additional duty, and the Rates of Duty 1-Special subcolumn reads "The duty provided in the applicable subheading + 50%". In practice a USMCA-qualifying Canadian wine shipment keeps its 0 percent preferential underlying rate and pays 0 + 50 = 50 percent. Temporary duty exemptions or reductions under chapter 99 subchapter II are treated the same way.

The interaction with Section 232 used to run the other way, absolutely: through August 2026, Section 338 never applied to an article already subject to Section 232 duties, per clause 2 of every proclamation and the note 51(c) "No change" list. That changed on September 15, 2026 (CBP CSMS #69851916): Proclamations 11064 and 11065 narrowed the exclusion to the dairy heading (9903.03.13) only. The alcohol heading (9903.03.12) and the motor-vehicle-grievance heading (9903.03.14) now stack their 50 percent Section 338 duty on top of any Section 232 duty owed on the same article. An importer should confirm which heading a good falls under before assuming the two duties cannot stack — for dairy they still cannot; for alcohol and motor-vehicle-grievance goods they now do.

Section 338 was enacted as part of the Tariff Act of 1930 — the same statute better known for the Smoot-Hawley schedule — and then went almost entirely unused. Through the post-war era the United States pursued discrimination complaints through the General Agreement on Tariffs and Trade and later the World Trade Organization, and later through Section 301 of the Trade Act of 1974, which had a defined investigative process. Section 338 required no investigation and had no procedural apparatus, which made it powerful and, for decades, politically unattractive.

That changed on July 20, 2026, when three Section 338 proclamations were signed on the same day, all directed at Canada. They were published in the Federal Register on July 23, 2026 at 91 FR 46639 (Proclamation 11046, alcoholic beverages), 91 FR 46653 (Proclamation 11047, dairy) and 91 FR 46663 (Proclamation 11048, motor vehicles), and were scheduled to take effect August 19, 2026 — the earliest date the statute's 30-day minimum lead permits. Proclamation 11056 (91 FR 54789) delayed that start by three days, so the duties actually took effect August 22, 2026.

The actions arrive in an already crowded year. Section 122's uniform global surcharge was enacted February 24, 2026 and lapsed by operation of its 150-day limit on July 24, 2026. A forced-labor Section 301 duty took effect the same day across roughly 60 economies. Section 232 expanded to commercial trucks in November 2025, semiconductors in January 2026 and patented pharmaceuticals in mid-2026. Less than a month after Section 338 began, Proclamations 11064 and 11065 (published September 14, 2026, effective September 15) narrowed the Section 232 exclusion to the dairy heading alone and expanded the alcohol and motor-vehicle-grievance annexes; Proclamations 11061, 11062 and 11063 (same publication date) went further still, banning rather than taxing a list of Canadian goods effective September 29, 2026.

Against that backdrop, Section 338 is the narrowest of the recent authorities by country coverage — one country — and the widest in one specific respect: it is the first to reach goods that a trade agreement had made duty-free, and now the first this site models to escalate from a tax to an outright import ban on part of its own annex.

Section 338 has no expiration date. The modifications continue in effect unless the action is expressly reduced, modified or terminated, and the statute lets the President suspend, revoke, supplement or amend at any time. Importers should treat the duty as open-ended rather than temporary, and should not plan around a lapse of the kind that ended Section 122.

The most likely path to change is diplomatic rather than legal. Each proclamation identifies a specific Canadian practice: provincial alcohol delisting, cheese tariff-rate quota administration, and the motor-vehicle grievance. If a practice is reversed, the proclamation answering it becomes the obvious candidate for withdrawal — though nothing in the text makes that automatic.

Litigation is possible but the statutory footing is unusually direct. Section 338 confers the authority in explicit terms, caps it at 50 percent and requires only the 30-day lead, all of which this action observed. That is a narrower target than the delegation questions that decided the IEEPA challenge in February 2026.

Importers of Canadian wine and spirits should model 50 percentage points of additional landed cost on goods entered from August 22, 2026, including on shipments claiming USMCA preference — but goods on the Proclamation 11061 annex, most of them limited to packaged forms, cannot be imported into the United States at all once imported on or after 12:01 a.m. eastern time on September 29, 2026 (Proclamation 11061, 91 FR 58311). A shipment imported before that moment but not yet entered still owes the 50 percent duty rather than facing the ban (clause 2), and if a court invalidates the ban for a given import, the 50 percent duty resumes for it (clause 9(b)). Importers of the diffuse chapter-by-chapter basket in the Proclamation 11048 annex should check their specific eight-digit classifications against the annex directly, because category-level generalisation is not reliable there, and should note that two of those lines are now passenger vehicles that also owe Section 232.