Section 301 Investigations: Process, Active Investigations, Hearings & Outcomes

A Section 301 investigation is an inquiry by the Office of the United States Trade Representative (USTR) into a foreign government’s trade practices. If USTR decides those practices are unfair, it can impose tariffs or other restrictions in response. As of October 20, 2026, four investigations are open and five actions are in force, with a sixth suspended until November 9, 2026.

Below, we explain how an investigation runs from initiation to decision, which proceedings are open now, how comments and hearings work, and how a company can take part.

What a Section 301 Investigation Is

A Section 301 investigation asks whether a foreign government’s act, policy, or practice is actionable under Section 301 of the Trade Act of 1974. The subject is always a government’s conduct, and that conduct isn’t limited to trade barriers. It can include how a government handles labor rights, including whether it tolerates forced labor. In 2026, USTR used Section 301 to investigate 60 economies for failing to keep goods made with forced labor out of their own markets.

Because the investigation targets a country, the resulting action applies to that country’s goods as a whole. A supplier with strong labor practices can still find its goods covered, and a supplier with poor ones won’t be singled out. That’s why companies need to understand labor risk at both levels: the country they source from, and the suppliers they work with.

The Statutory Basis

Section 301 refers to a group of provisions in the Trade Act of 1974, codified at 19 U.S.C. 2411 to 2417. Section 2411 sets out when USTR can act, and the sections that follow govern each stage of an investigation, as shown in the process table below. USTR’s rules for comments and hearings are in 15 CFR Part 2006.

The Three Grounds on Which USTR Can Act

The statute separates conduct USTR must act on from conduct it may act on.

USTR must act if it decides that a foreign government is denying U.S. rights under a trade agreement. It must also act if a practice breaches a trade agreement, or is unjustifiable and burdens U.S. commerce.

That obligation has exceptions. USTR does not have to act if a dispute settlement panel has rejected the U.S. claim. It also need not act if the country is already addressing the practice, has agreed to do so, or offers compensation instead. The same applies if acting would cause serious economic hardship or harm national security.

USTR may act, at its discretion, if a practice is unreasonable or discriminatory and burdens U.S. commerce.

The statute defines three types of practice:

• Unjustifiable: breaches U.S. rights under international law or a trade agreement.
• Unreasonable: unfair or inequitable, even if it breaks no legal rule.
• Discriminatory: treats U.S. goods, services, or investment worse than those of the foreign country itself or of other trading partners.

The unreasonable category covers labor practices. The statute gives two examples: persistently tolerating forced labor, and denying workers the right to organize and bargain collectively. USTR relied on this category for the 2026 forced labor investigations, so it was free to act but not required to.

Section 301 works at the country level, so USTR can penalize a trading partner over practices its government allows. A separate law, Section 307 of the Tariff Act of 1930, works at shipment level. Under it, U.S. Customs and Border Protection (CBP) detains individual shipments suspected of containing goods made with forced labor.

Why Investigation, Determination, and Action Are Three Separate Stages

An open investigation does not mean a company owes anything yet. USTR investigates first, then determines whether the practice is actionable, then decides what to do. Each stage has its own notice and its own timing. 

Tariffs are the most common outcome because the statute tells USTR to prefer duties over other import restrictions, but they are not the only option. USTR can also suspend trade agreement concessions, restrict services, withdraw duty-free treatment, or agree to a deal in which the country ends the practice or pays compensation.

Two investigations into Vietnam show how this might play out. USTR opened both the currency valuation case and the illegal timber case on October 2, 2020, and closed both with monitoring rather than tariffs.

How a Section 301 Investigation Begins

Every investigation opens with a Federal Register notice, but the push to start one can come from outside USTR or from USTR itself.

Petition-Initiated Investigations

Any interested person may file a petition asking USTR to act. Under 15 CFR Part 2006, that includes producers, importers, exporters, investors, intellectual property rights holders, and trade associations. The petition must identify the petitioner and its economic interest. It must also:

• describe the trade agreement rights denied, or the practice said to be actionable;
• attach the relevant foreign laws or regulations; and
• show how U.S. commerce is burdened, with trade volume data and the method used to calculate it.

USTR must then decide whether to open an investigation within 45 days of receiving the petition. If it declines, it must tell the petitioner and publish its reasons in the Federal Register.

USTR’s investigations page currently lists petitions on Coupang in Korea and on seasonal and perishable agricultural products, plus a withdrawn petition on illicit fentanyl from China.

Self-Initiated Investigations

USTR may also open an investigation on its own. It publishes its decision in the Federal Register and consults the relevant congressional committees first. Most of the large recent cases began this way, including the forced labor investigations and the investigations into 16 economies over structural excess capacity (91 FR 12886).

In one situation, USTR must open an investigation. Each year, its Special 301 review of intellectual property protection can name a country a priority foreign country, meaning one with the most harmful intellectual property practices. Once USTR names one, it has 30 days to open an investigation, unless it tells Congress in writing that doing so would harm U.S. economic interests. Vietnam is the current example. USTR named it on April 30, 2026, and opened an investigation on May 29, 2026.

Consultation With the Foreign Government Named in the Investigation

On the day it opens an investigation, USTR must ask the foreign government for consultations. These talks run alongside the comment period and hearing. If the government agrees to change the practice, USTR can close the case without taking any action.

The Section 301 Investigation Process, Step by Step

The stages below apply to every investigation, though timing varies with how the case began and whether a trade agreement is involved. The 2026 forced labor investigations, which ran from initiation to duties in about four months, show how each stage works.

 

Stage	Statutory reference	Who acts	Timing	What a company can do
Initiation	19 U.S.C. 2412	USTR	45 days to decide on a petition. No fixed period for self-initiation	Read the Federal Register notice and note the docket numbers
Consultation	19 U.S.C. 2413	USTR and the foreign government	Requested on the day of initiation	Nothing directly. Consultations are government to government
Comment period	19 U.S.C. 2412, 15 CFR 2006	Interested persons	Set in the initiation notice. 34 to 53 days in recent cases	File a comment through the docket
Public hearing	19 U.S.C. 2412, 15 CFR 2006	Section 301 Committee	Within a few weeks after the comment deadline	Request to appear, then give oral testimony
Rebuttal comments	15 CFR 2006	Interested persons	Seven days after the hearing closes in recent cases	Respond to what other parties said
Dispute settlement	19 U.S.C. 2413	USTR	Where a trade agreement applies, and consultations do not resolve the case	Monitor the proceeding
Decision	19 U.S.C. 2414	USTR	Depends on the route. See below	Prepare for the proposed action notice
Action	19 U.S.C. 2411, 2415	USTR	Within 30 days of the decision, subject to delay	Comment on scope and exemptions

Initiation, the Federal Register Notice, and the Docket

USTR announces each investigation in a Federal Register notice. The notice defines what USTR is investigating, sets the deadlines, and opens the dockets where the public files submissions. Most notices open two dockets: one for written comments and one for requests to appear at the hearing. A hearing request filed to the comment docket may not count, so check the notice before filing. USTR opened the forced labor investigations on March 12, 2026 (91 FR 12884).

The Public Comment Period

The initiation notice sets the comment deadline, which has fallen roughly five to eight weeks after initiation in recent cases. In the forced labor investigations, comments were due April 15, 2026, 34 days after USTR opened them.

Public Hearings and Post-Hearing Rebuttal Comments

If anyone asks to appear, the Section 301 Committee, an interagency panel that USTR chairs, holds a public hearing, usually a few weeks after the comment deadline. After the hearing closes, parties have a short window to file rebuttal comments, seven days in recent cases. Rebuttals are the only chance to respond to what other parties said. The forced labor hearings ran from April 28 to May 1, 2026.

Dispute Settlement Where a Trade Agreement Is Involved

When a case concerns U.S. rights under a trade agreement and consultations fail, USTR must request formal dispute settlement under that agreement. It must do so by the end of the consultation period the agreement sets, or 150 days after consultations begin, whichever comes first. This route also extends USTR’s decision deadline to 18 months. Among the open cases, only the investigation into China’s Phase One commitments follows it.

Determination, and the Statutory Deadlines That Govern It

USTR’s deadline to decide depends on the type of case:

• Trade agreement cases: 30 days after dispute settlement ends, or 18 months after initiation, whichever comes first.
• Priority foreign country cases without a trade agreement: six months, extendable to nine if the issues are complex or the country is making progress on legislation or enforcement.
• All other cases: within 12 months of initiation.

These are outer limits, and USTR can decide sooner. In the forced labor cases, it published its decisions on June 5, 2026 (91 FR 34272), less than three months after opening the investigations.

Implementation of Responsive Action Within 30 Days of an Affirmative Determination 

Once USTR decides to act, it must impose the action within 30 days. It can delay by up to 180 days if the petitioner or most of the affected domestic industry asks, or if talks with the foreign government are making progress. In the forced labor cases, USTR proposed its action alongside its decisions and reopened comments. Duties then took effect on July 24, 2026.

What Happens After a Determination

USTR’s work continues after a determination, whether or not it takes action.

Monitoring of Foreign Compliance

Sometimes a foreign government agrees to fix the practice. USTR must then monitor what it actually does. If USTR decides the country is not delivering, it must decide what further action to take. That decision carries the same legal standing as one made in the original investigation. Both Vietnam cases from 2020 ended this way.

Modification, Delay, and Termination of an Action

An action once taken is not fixed. USTR can modify it, widen or narrow its product scope, grant or withdraw exclusions, or suspend it.

The action against China’s maritime, logistics, and shipbuilding sectors shows how far that can go. USTR modified it twice during 2025, then suspended it for a year from November 10, 2025 (90 FR 50947). A suspension pauses an action rather than ending it. That suspension is due to end on November 9, 2026, and USTR has published no notice extending it. Companies with affected shipments should confirm the position with their customs broker before that date.

The Four-Year Termination Review, and How a Domestic Industry Requests Continuation

Every Section 301 action ends automatically after four years unless someone requests a continuation. The petitioner can ask, as can a representative of the benefiting domestic industry. The request must be in writing and must arrive during the last 60 days of the four-year period. USTR then reviews how well the action worked, what else it could do, and the effects on the U.S. economy, including on consumers. USTR must also write to the petitioner and the industry at least 60 days before an action ends.

The 2018 China actions have now been through this twice. They survived a first review that USTR completed in September 2024 (89 FR 76581). USTR opened a second review on May 6, 2026 (91 FR 24636) and took continuation requests until August 22, 2026. On October 7, 2026, USTR confirmed that it had received requests for both actions, so neither was terminated and both remain in effect (91 FR 64212). The review itself continues, and USTR can still modify the actions.

Our guide to Section 301 China tariffs covers the current rates and product lists. Our guide to Section 301 tariff exclusions covers which products are exempt and how to claim one.

Active Section 301 Investigations and Proceedings

The tables below show the status of each proceeding as of October 20, 2026, based on Federal Register notices. USTR’s investigations page doesn’t show whether a case is open, decided, or suspended, so the notices are the only reliable record.

Investigations Currently Open

USTR has published no decision in any of the following.

Investigation	Economy	Opened	Latest step on the record	Next date on the record
Underpayment for innovative pharmaceutical products	Germany	June 18, 2026	Hearing held September 22, 2026	Decision due by June 18, 2027
Intellectual property protection and enforcement	Vietnam	May 29, 2026	Comment period closed July 2, 2026	Decision due by November 29, 2026
Structural excess capacity in manufacturing	16 economies	March 11, 2026	Hearing held May 5 to 8, 2026	Decision due by March 11, 2027
Implementation of commitments under the Phase One Agreement	China	October 24, 2025	Hearing held December 16, 2025	Decision due by April 24, 2027

The dates above are legal deadlines, not dates USTR has said it will decide. Phase One carries the 18-month period because it concerns rights under a trade agreement. Vietnam carries the six-month period because USTR named it a priority foreign country.

The structural excess capacity investigation is the broadest open case. Our guide to Section 301 structural excess capacity names the 16 economies and the sectors under review.

Proceedings That Have Resulted in Action and Remain in Force

Five actions are currently in force. The Nicaragua action reaches goods that don’t qualify under the Dominican Republic-Central America-United States Free Trade Agreement (CAFTA-DR).

Investigation	Economy	Action	Effective	Next date on the record
Failure to ban imports made with forced labor	60 economies	Additional duties of 10% or 12.5%, with exemptions (91 FR 47318)	July 24, 2026	None published
Digital trade, payment services, tariffs, anti-corruption, intellectual property, ethanol, and deforestation	Brazil	25% duty on imports of Brazil, with exemptions (91 FR 45516)	July 22, 2026	None published
Targeting of the semiconductor industry	China	Tariff set at 0%, due to rise on June 23, 2027 (90 FR 60848)	December 23, 2025	Rate announced at least 30 days before June 23, 2027
Labor rights, human rights, and the rule of law	Nicaragua	Tariff rising from 0% to 10% then 15% on non-CAFTA-DR goods (90 FR 60850)	January 1, 2026	10% applies from January 1, 2027
Technology transfer, intellectual property, and innovation	China	Duties under the 2018 actions, as modified. Continued October 7, 2026 (91 FR 64212)	2018, modified since	Second four-year review continues

Two of these actions, on Chinese semiconductors and on Nicaragua, start at 0% and rise on a set schedule. Confirm current status in the Federal Register before acting on any row.

Investigations Concluded or Terminated

Investigation	Economy	Opened	Outcome
Currency valuation	Vietnam	October 2, 2020	USTR took no action and chose monitoring instead, July 2021 (86 FR 40675)
Illegal timber	Vietnam	October 2, 2020	USTR agreed terms with Vietnam and took no tariff action, October 2021 (86 FR 55681)
Large civil aircraft dispute	European Union (EU) and United Kingdom (UK)	April 12, 2019	Action suspended for five years from July 4, 2021 for UK goods and July 11, 2021 for EU goods (86 FR 36313)

USTR has published no further notice on the large civil aircraft action since the suspension took effect, and its page for that dispute lists no document after July 9, 2021. Any company with exposure to those product lists should confirm the current position with its customs broker rather than read anything into the absence of a notice.

How to Follow or Take Part in a Section 301 Investigation

Any company can track a case and submit evidence to USTR through public notices and an online portal.

Locate the Docket and Track a Proceeding

USTR’s investigations page collects each case’s documents, but the Federal Register is the official record of USTR’s decisions. A free Federal Register email alert for USTR documents flags new cases at initiation, when the comment window opens.

File a Written Comment: What Makes a Comment Useful to USTR

Companies file comments through USTR’s online comment portal, using the docket number in the initiation notice. USTR’s regulations still describe filing paper copies, but recent notices all direct filers to the portal, so follow the notice.

USTR gives the most weight to comments backed by evidence. Useful comments:

• Answer the questions the notice asks, rather than arguing trade policy in general
• Quantify the effect on the company, with trade volumes, tariff classifications, and sourcing data
• Identify products with no alternative source, which is the usual basis for an exemption
• Arrive by the deadline, since USTR only commits to considering timely submissions

For example, a company that buys a component from two suppliers in an economy under investigation could give its annual import volume and the component’s tariff classification. It could then explain what switching to a supplier elsewhere would cost and how long it would take.

Request to Appear at a Public Hearing

A request to appear is separate from a written comment and often goes to a different docket. Under 15 CFR Part 2006, the requester must also have filed a written brief. The request deadline often matches the comment deadline.

Handle Confidential Business Information in a Submission

A submitter can mark material as business confidential where it consists of trade secrets or sensitive commercial information. The submitter must certify in writing that disclosure would harm its proprietary interests and that the information is not already public. The Section 301 Committee chair can then keep the material out of public inspection. If the chair refuses a claim, they must explain the refusal in writing, and the submitter can withdraw the submission.

Supplier names, volumes, and pricing are the categories most often at issue. A submission that leaves them out entirely is usually less useful to USTR than one that supplies them under a confidentiality claim.

What an Open Investigation Means for Sourcing and Supply Chain Planning

An open investigation creates no duty, but it tells a company where to look and when a decision could arrive.

Assessing Exposure Before a Determination Is Issued

An initiation notice tells a company which economies and practices USTR is examining and the latest date a decision can arrive. It doesn’t say whether USTR will act, what form the action would take, or which products it would cover.

The most useful preparation holds its value whatever USTR decides. Four factors decide whether an action reaches a product: tariff classification, country of origin, entry date, and any exemption. A supply base mapped by origin and classification can be checked against each new action as it’s announced.

Several recent cases concern labor conditions, deforestation, or the rule of law, and the supplier evidence on those issues usually sits with sustainability and procurement teams rather than customs. EcoVadis helps those teams see where supplier relationships concentrate in the economies under investigation and keep a documented record of supplier engagement. Calculating the duty on a specific product remains a customs classification task.

Decisions That Sit Inside the Comment Window, and Decisions That Can Wait

The comment and hearing request deadlines are a company’s main chances to present its own evidence before USTR decides. Both typically fall five to eight weeks after initiation, often on the same day, so companies that want to participate must decide early.

Re-sourcing, repricing, and contract renegotiation can wait, because neither the outcome nor the product scope is known until USTR decides. Set a review date at the statutory deadline for each relevant case, and act on the decision notice rather than the initiation notice.

FAQs

What is a Section 301 investigation?

A Section 301 investigation is an inquiry by USTR into whether an act, policy, or practice of a foreign government is actionable under Section 301 of the Trade Act of 1974. The subject is a government’s conduct, not an individual company’s.

Who can request a Section 301 investigation?

Any interested person can file a petition, including producers, importers, exporters, investors, intellectual property rights holders, and trade associations. USTR must decide whether to open an investigation within 45 days, and must publish its reasons if it declines. USTR can also open one on its own.

How long does a Section 301 investigation take?

The legal limit for a Section 301 investigation is 12 months from initiation in most cases, 18 months where a trade agreement is involved, and six months where USTR has named a priority foreign country. USTR can decide sooner. In the forced labor cases, it published decisions within three months after opening them.

What happens at a Section 301 public hearing?

The Section 301 Committee takes oral testimony from interested persons who requested to appear by the deadline and filed a conforming written brief. Hearings run several weeks after the comment deadline. Parties can file rebuttal comments afterward, in recent cases within seven days.

Can a business take part in a Section 301 investigation?

Yes. Any interested person can file a comment through the docket in the initiation notice, and can separately request to appear at the hearing. Sensitive commercial information can go in under a business confidential claim, supported by the certification the regulations require.

Which Section 301 investigations are currently open?

As of October 20, 2026, USTR has open investigations into Germany’s pharmaceutical pricing, Vietnam’s intellectual property protection, structural excess capacity across 16 economies, and China’s Phase One commitments. The forced labor investigations covering 60 economies have already produced an action that is in force.

Does a Section 301 investigation always end in tariffs?

No. USTR can agree on terms with the foreign government, suspend or withdraw trade agreement concessions, restrict services, or close a case with monitoring and no action. Both Vietnam investigations opened in October 2020 closed with monitoring.

How is a Section 301 investigation different from a Section 201 or Section 232 investigation?

Section 301 examines a foreign government’s conduct, and USTR runs it. A Section 232 investigation examines whether imports harm national security, and the Department of Commerce runs it. A Section 201 safeguard investigation examines whether an import surge is seriously injuring a domestic industry, and the U.S. International Trade Commission runs it. Our comparison of Section 201 vs. 232 vs. 301 explains how the three programs differ.

Sources last verified: Checked against USTR and the Federal Register on October 20, 2026.