USTR brought representatives of more than 50 economies to Washington to learn how to build forced-labor import bans, the enforcement arm of a Section 301 tariff program that now touches 99.4 percent of American imports.
WASHINGTON, Sept. 16, 2026. The Office of the U.S. Trade Representative convened representatives of more than 50 trading partners on Sept. 15 for training on how to impose and enforce prohibitions on the importation of goods made with forced labor, a session that converts the most sweeping tariff action of the year from a punitive measure into a technical assistance program with a defined exit ramp.
USTR said in a statement issued the same day that it is partnering with the Department of Homeland Security, U.S. Customs and Border Protection and the Department of Labor to deliver the training, and that it will follow with what it described as in-depth and country-specific technical assistance. The agency framed the effort as part of a whole-of-government push to support governments willing to combat trade in forced-labor goods through import prohibitions at their own borders.
The convening is the operational sequel to the Section 301 action taken on July 23, 2026, when Ambassador Jamieson Greer, at the president’s direction, imposed additional duties of 10 percent or 12.5 percent on 60 trading partners following investigations into their failure to impose or effectively enforce a ban on importing goods produced with forced labor. Those duties took effect July 24. By USTR’s own accounting, the action reaches the top 60 U.S. trade partners, covering 99.4 percent of American imports.
The theory of the case
The architecture of the forced-labor tariffs is unusual among recent American trade actions in that it specifies a condition for removal. Economies that impose a forced-labor import prohibition, or that have committed to impose and enforce one through an Agreement on Reciprocal Trade, or that maintain a partial regime that has the effect of preventing importation of certain forced-labor goods, were assigned the 10 percent rate. All other economies were assigned 12.5 percent.
That two-tier structure makes the tariff a lever rather than a penalty. A country at 12.5 percent can, in principle, move to 10 percent by legislating an import ban. The Sept. 15 training session is the mechanism by which Washington is supplying the technical capacity to do so.
In its statement, USTR said that as a result of these efforts and the Section 301 investigation, by July 2026 twelve additional economies had adopted measures prohibiting the importation of goods made by forced labor. The agency named Cambodia, Canada, Ecuador, the European Union, Guatemala, Honduras, India, Indonesia, Mexico, Pakistan, Sri Lanka and Trinidad and Tobago. It added that dozens more countries have since expressed interest in adopting similar measures.
That list is notable for its breadth. It spans a major developed-economy bloc in the European Union, two of the largest emerging markets in India and Indonesia, and a cluster of Central American and Caribbean economies whose apparel sectors are deeply integrated with American supply chains. If the measures are implemented and enforced, they would represent the most significant expansion of forced-labor trade controls since the United States began enforcing its own prohibition.
Background: a century-old statute, newly weaponized
The American prohibition on importing goods made with forced labor traces to Section 307 of the Tariff Act of 1930, and USTR notes that the United States has maintained such a ban for nearly a century. For most of that period the provision was largely dormant, constrained by a consumptive demand exception that permitted imports where domestic production could not meet U.S. demand. That exception was repealed in 2016, and enforcement accelerated sharply thereafter through Withhold Release Orders and, later, the rebuttable presumption established for goods with a nexus to the Xinjiang Uyghur Autonomous Region.
USTR’s July fact sheet asserted that the United States is the only country in the world to adopt and effectively enforce a ban on imports made with forced labor, and that the president is asking all trading partners to join in eliminating forced labor from global supply chains. The agency situated the current action in a longer arc, pointing to the forced-labor import prohibition commitments secured from Canada and Mexico when the North American Free Trade Agreement was replaced by the United States-Mexico-Canada Agreement, and noting that adoption of such a prohibition has been included as a component of the Agreements on Reciprocal Trade negotiated in the current term. USTR said that ten trading partners have agreed to enact such a ban in their Agreements on Reciprocal Trade.
Enforcement activity has continued in parallel. USTR cited two Withhold Release Orders issued by CBP in June 2026, one against copper and copper products manufactured in Serbia by Zijin Copper DOO and two against apparel products manufactured in Jordan. CBP personnel at all U.S. ports of entry detain shipments covered by a WRO where evidence reasonably indicates the use of forced labor in production. The agency also published importer guidance in June 2026 explaining the differences among the various forced-labor authorities and their respective enforcement processes.
What the tariffs cover, and what they do not
The exemption structure is where the action becomes operationally complex for importers.
USTR’s fact sheet states that the duties apply to most imports from covered countries but exclude informational materials, donations and accompanied baggage; all articles and parts of articles subject to Section 232 tariffs; and a further category of products identified in the Federal Register notice. That last category is defined by five rationales: raw materials whose inclusion could lead to unavailability of domestic supply; products that could cause economy-wide disruptions; products that cannot be grown or produced in sufficient quantities in the United States or obtained from other sources; products whose exemption would encourage economies to enact and effectively enforce a forced-labor import prohibition; and articles for which additional tariffs would not contribute substantially to eliminating the conduct found actionable.
The blanket carve-out for Section 232 merchandise is the single most consequential exclusion. Steel, aluminum, copper and their derivatives, semiconductors, pharmaceuticals and active ingredients, unmanned aircraft systems, polysilicon and downstream solar products all sit outside the forced-labor duties because they are already subject to national security tariffs. The practical effect is that a large and growing share of American imports by value is insulated from this particular action while carrying heavier duties under another.
Analysis published at the time of the final action also noted exemptions for USMCA-compliant goods, certain textiles entered under the Dominican Republic-Central America Free Trade Agreement, and goods that had not been subject to the expiring Section 122 duties, including articles for civil aircraft use and pharmaceutical products and ingredients.
For a customs compliance team, this means classification alone does not determine exposure. Country of origin, preference program eligibility, Section 232 inclusion status and the specific exemption annexes all have to be checked against a single entry line.
Why the timing matters
The forced-labor duties took effect July 24, 2026, the day the administration’s Section 122 authority expired. That sequencing was not coincidental.
In February 2026 the Supreme Court held in Learning Resources, Inc. v. Trump that the International Emergency Economic Powers Act does not authorize the president to impose tariffs, and CBP ceased collecting IEEPA duties on Feb. 24. The administration turned to Section 122 of the Trade Act of 1974, which permits a temporary surcharge of up to 15 percent for no more than 150 days. That window ran from Feb. 24 to July 24, 2026. The Court of International Trade subsequently held in August that the 10 percent global rate imposed under Section 122 was unlawful because the statutory balance-of-payments condition was not met.
Section 301 has a different profile. It rests on an investigation, a published determination, a comment period and a hearing, and it has withstood repeated litigation over three decades. By routing a near-universal tariff through 60 individual Section 301 investigations, the administration replaced an authority the courts had rejected with one they have consistently upheld, while giving the measure a substantive justification that is difficult to characterize as pretextual.
That is the context in which the Sept. 15 training session should be read. A Section 301 action must be tied to specific acts, policies or practices, and it is subject to periodic review and to termination when the conduct is remedied. Building out the technical assistance apparatus demonstrates that the United States is pursuing the remedy the statute contemplates, which strengthens the action’s position if it is challenged.
Stakeholder reactions
Reaction to the July action and to the follow-on engagement has split along predictable lines.
Labor advocates and anti-trafficking organizations have welcomed the export of import-ban architecture, arguing that the American prohibition has been undercut for years by the ability of sanctioned goods to be diverted into markets without equivalent controls. The diversion problem is real and well documented: merchandise detained at U.S. ports is frequently re-manifested and sold elsewhere, which limits the deterrent effect on the producer.
Trade law practitioners have been more measured. Analyses published by Wiley, Troutman Pepper Locke and others following the July action emphasized the breadth of the coverage and the compliance burden created by the exemption structure, and noted that the action functions in practice as a near-universal tariff with a labor-rights rationale. Global Trade Alert, in its assessment of the final action, characterized it as one of the most extensive single trade measures of the period.
Importer-side reaction has focused less on the principle than on the mechanics. The combination of a two-tier rate, a long exemption annex, and interaction with Section 232 inclusions has required substantial reclassification work. Companies with diversified sourcing across a dozen or more origins have had to build country-by-country rate matrices and refresh them as economies move between tiers.
Foreign governments have responded unevenly. The twelve economies USTR credits with adopting prohibitions by July 2026 moved quickly, in several cases with legislation that had been in preparation for other reasons. Others have objected that the measure conditions market access on domestic legislative choices, a criticism that mirrors longstanding complaints about unilateral Section 301 action.
Economic impact analysis
Quantifying the cost of the forced-labor duties requires care because of the exemption structure. The headline coverage figure of 99.4 percent of U.S. imports refers to the share of imports originating in the 60 covered economies, not the share of imports actually subject to duty. Once Section 232 merchandise, USMCA-qualifying goods, DR-CAFTA textiles and the enumerated product exemptions are removed, the dutiable base is materially smaller.
Even so, the aggregate is large. Applying a 10 to 12.5 percent rate across a dutiable base measured in the hundreds of billions of dollars produces annualized collections well into the tens of billions. The incidence falls first on the importer of record, who must deposit the duty at entry, and then is distributed across the supply chain through negotiated price adjustments, margin compression and, ultimately, consumer prices.
The tier structure creates a measurable competitive spread. A 2.5 percentage point differential between a 10 percent and a 12.5 percent economy is meaningful in categories where gross margins are thin. In apparel, footwear, furniture and similar sectors, sourcing managers have historically shifted volume for smaller differentials than that. As additional economies legislate prohibitions and move from the higher to the lower tier, the relative attractiveness of remaining 12.5 percent origins declines further.
There is also a second-order compliance cost that does not appear in duty collections. Firms sourcing from economies that newly adopt import prohibitions will face supplier-side documentation requests, because those suppliers must now satisfy their own governments’ import controls on inputs. A garment manufacturer in a country that adopts a forced-labor ban will need traceability evidence for its fabric and yarn, and will push those requirements down its own chain. American buyers will be asked to fund and support that work.
Implications for importers and exporters
Several practical consequences follow.
First, treat the country tier assignment as a variable, not a constant. Economies are moving between the 10 percent and 12.5 percent tiers as they legislate. Landed cost models built on a snapshot will drift. Compliance teams should establish a review cadence tied to USTR notices rather than waiting for a broker to flag a rate change.
Second, build the Section 232 interaction into the entry logic. Because Section 232 articles are excluded from the forced-labor duties entirely, an importer of, for example, a steel derivative article is not paying the forced-labor rate but is paying the Section 232 rate on the full customs value. Confusing the two produces both overpayment and underpayment errors, and the derivative article lists have been expanded repeatedly, including through the addition of hundreds of product categories to the steel and aluminum inclusions.
Third, invest in supply chain traceability now rather than reactively. The direction of travel is unambiguous: more jurisdictions adopting import prohibitions, more enforcement authorities with different evidentiary standards, and more requests for chain-of-custody documentation at multiple tiers of the supply base. CBP’s June 2026 importer guidance on the differences among forced-labor authorities is the baseline reference. Firms that can produce credible tracing to raw material for high-risk inputs, particularly cotton, polysilicon, aluminum, seafood and certain minerals, will face less friction as other jurisdictions come online.
Fourth, review the exemption annex line by line rather than by product family. The five exemption rationales are applied at the subheading level, and closely related articles can fall on opposite sides. Assumptions drawn from a competitor’s treatment or from a trade association summary are not a substitute for reading the notice.
Fifth, exporters should note the reciprocal dimension. As trading partners adopt import prohibitions, American exporters of agricultural commodities, minerals and manufactured inputs will begin receiving traceability requests from foreign customs authorities. U.S. firms that have built documentation systems for domestic compliance are well positioned; those that have relied on the absence of foreign requirements are not.
The diversion problem the training is meant to solve
The technical rationale for exporting import-ban architecture rests on a structural weakness in unilateral enforcement that has been visible for years.
When CBP detains a shipment under a Withhold Release Order or the Uyghur Forced Labor Prevention Act rebuttable presumption, the goods do not cease to exist. The importer may export them, and the producer retains the option of selling into markets without equivalent controls. The result is that American enforcement raises the cost of selling to the United States without meaningfully reducing the volume produced under coercive conditions. Producers treat it as a market allocation problem rather than a compliance problem.
A network of jurisdictions maintaining parallel prohibitions changes that calculation. If the European Union, India, Indonesia, Mexico, Canada and a dozen other markets all detain the same merchandise, the producer faces a genuine loss of addressable demand rather than a rerouting exercise. That is the theory behind the Sept. 15 convening, and it explains why USTR paired the tariff action with capacity building rather than treating the duties as an end in themselves.
Execution is the open question. Adopting a prohibition is a legislative act; enforcing one requires customs targeting capability, laboratory and forensic capacity, legal authority to detain on the basis of reasonable indication rather than proof, and administrative machinery to adjudicate importer petitions. The United States built that apparatus over a decade and continues to refine it. USTR’s decision to pair the training with what it described as in-depth and country-specific technical assistance acknowledges that the gap between statute and enforcement is where most regimes will stall.
The distinction also has tariff consequences. The two-tier structure assigns 10 percent to economies that impose a prohibition or have committed to one, and 12.5 percent to those that have not. It does not, on its face, create a third tier for economies that legislate but fail to enforce. Whether USTR treats nominal adoption as sufficient, or later revisits economies whose prohibitions prove inert, is among the more consequential unresolved questions for sourcing strategy.
Sector concentration
Forced-labor risk is not distributed evenly across the tariff schedule, and neither is the compliance burden that flows from the expanding enforcement network.
Cotton and downstream textiles remain the most scrutinized category, reflecting a decade of enforcement attention to upstream production and the difficulty of tracing fiber through spinning, weaving and cut-and-sew stages that routinely cross three or four borders. Apparel importers have invested more heavily in isotopic testing, transaction-level tracing and supplier mapping than any other sector, and the June 2026 Withhold Release Orders against apparel manufactured in Jordan demonstrate that the risk is not confined to a single origin.
Polysilicon and downstream solar products form a second cluster, one that now sits at the intersection of forced-labor enforcement and Section 232 action, since the August 2026 polysilicon proclamation established minimum import prices and a duty structure covering cells, modules, ingots and wafers. Importers in this category face two separate regimes with different evidentiary demands.
Metals form a third. The June 2026 Withhold Release Order against copper and copper products manufactured in Serbia extended forced-labor enforcement into a base-metal supply chain that had previously drawn limited attention, and it did so in a European jurisdiction rather than in the geographies most associated with the issue. That case is a useful signal for compliance teams that have scoped their programs by country rather than by commodity risk.
Seafood, certain minerals used in battery and electronics manufacturing, and agricultural commodities including cocoa and palm derivatives round out the categories where tracing expectations are rising fastest.
Documentation as the operative cost
For most importers, the recurring cost of this policy environment is not the duty rate. It is the evidentiary burden.
Rebutting a detention requires a supply chain map that runs to raw material, transaction records at each tier, production records demonstrating that the detained goods correspond to the documented inputs, and labor records for the facilities involved. Assembling that package after a detention is expensive and slow, and cargo sits while it is prepared. Assembling it in advance, for the inputs that carry the highest risk, converts an unpredictable disruption into a fixed program cost.
As additional jurisdictions stand up their own prohibitions, the same documentation will be requested by multiple authorities applying different standards. Firms that have built a single traceability system capable of producing evidence in different formats will absorb that expansion more easily than firms that have treated each enforcement action as a discrete project.
What to watch
The operative signals in coming months are the identity of economies that adopt prohibitions and consequently move to the 10 percent tier, any USTR notice adjusting the country lists or the exemption annexes, and whether the technical assistance program produces legislation in the larger 12.5 percent economies.
Also worth monitoring is whether the Section 301 structure draws litigation. The action rests on 60 separate investigations conducted on a compressed timeline, and the relationship between the conduct found actionable and the near-universal scope of the remedy is the kind of question that has generated challenges to prior Section 301 measures. Given that the same administration has already lost on IEEPA at the Supreme Court and on Section 122 at the Court of International Trade, the durability of this authority is not a theoretical question for importers deciding whether to file protective claims.