Section 301 Explained: What Is Section 301 of the Trade Act of 1974?

Section 301 of the Trade Act of 1974 gives the U.S. Trade Representative (USTR) the authority to investigate a foreign government’s trade practices and respond when those practices harm U.S. commerce. It’s a law, not a tariff, though tariffs are the response it produces most often.

The distinction most often missed is this: Section 301 is an authority, not a tariff. Each action taken under Section 301 has its own scope, product coverage, effective date, and exclusions. Whether a particular shipment is covered depends on all of those factors.

This article explains what Section 301 is, how an investigation becomes an action, how to tell whether a product falls inside one, and what that means for sourcing decisions.

 

What is Section 301?

Section 301 is the part of U.S. trade law that lets the United States respond to a foreign government’s trade practices, either when those practices breach commitments made under a trade agreement or when they unfairly burden or restrict U.S. commerce.

Section 301 empowers USTR to investigate a specific practice by a specific country, then decide on a response. Every response is a separate action with its own scope, rate, product coverage, and effective date. When people say “Section 301 tariffs,” they mean the duties imposed under one of those actions, rather than a single tariff that applies across the board.

For organizations with global supply chains, the most consequential recent use of Section 301 concerns forced labor. Section 301(b) allows USTR to investigate and penalize trading partners over how those governments enforce prohibitions on imports made with forced labor. 

Section 301 operates as a trade enforcement instrument rather than a compliance reporting framework: it requires no annual filing or due diligence plan, but it can impose tariffs on an entire country’s goods at short notice. It sits alongside Section 307 of the Tariff Act of 1930, under which U.S. Customs and Border Protection (CBP) detains individual shipments suspected of containing forced labor inputs. 

Together, the two statutes reach supply chains from opposite directions: one at the level of a country’s trade policy, the other at the level of a single container.

What is Section 301 of the Trade Act of 1974?

Section 301 sits in Title III of the Trade Act of 1974, codified at 19 U.S.C. §§2411-2420. Congress passed it to give the United States a faster, more certain way to respond to foreign trade barriers than negotiation alone allowed.

For two decades, it was used often. Then the World Trade Organization’s dispute settlement system arrived in 1995, and the United States moved most of its complaints there. Of roughly 130 Section 301 cases since 1974, only 35 came after 1995. Use picked up again from 2017 and has accelerated sharply since.

What Makes a Practice Actionable?

The statute sets out several distinct legal triggers, each with different consequences. Under 19 U.S.C. §2411, USTR must act where it determines that:

• the rights of the United States under any trade agreement are being denied;
• a foreign act, policy, or practice violates, is inconsistent with, or otherwise denies benefits to the United States under a trade agreement; or
• a foreign act, policy, or practice is unjustifiable and burdens or restricts U.S. commerce.

USTR may act, at its discretion, where it determines that a practice is unreasonable or discriminatory and burdens or restricts U.S. commerce.

The statute defines each term. A practice is “unjustifiable” if it violates or is inconsistent with the United States’ international legal rights. It is “unreasonable” if, while not necessarily violating those rights, it is otherwise unfair and inequitable. Practices are “discriminatory” where they deny national or most-favored-nation treatment to U.S. goods, services, or investment.

The definition of “unreasonable” matters for supply chains in particular. It expressly covers a persistent pattern of conduct that permits any form of forced or compulsory labor, which was the legal basis for the Section 301 forced labor action covering 60 economies in 2026.

How Does Section 301 Work?

An investigation moves through five stages.

 

1. Initiation. An interested party petitions USTR, or USTR opens an investigation on its own initiative.
2. Investigation. USTR publishes a notice in the Federal Register, invites written comments, and usually holds a public hearing.
3. Consultation. USTR requests consultations with the government concerned, and pursues formal dispute settlement where a trade agreement applies.
4. Determination. USTR decides whether the practice is actionable under the standards above.
5. Action. If USTR acts, it publishes the scope, rate, and effective date in the Federal Register.

 

One feature matters for planning: an action terminates automatically after four years unless someone requests its continuation and USTR conducts a review.

For the details behind each stage, including statutory timelines, petition requirements, hearing schedules, and the status of live cases, see Section 301 investigations.

What Role Does USTR Play?

USTR runs the investigation, makes the determination, and sets the action. CBP then collects any duties at the border. USTR decides whether a duty exists, and CBP decides whether a given shipment clears and at what rate.

What are Section 301 Tariffs?

Tariffs are the most visible outcome, and the statute directs USTR to give preference to duties when it restricts imports. They aren’t the only option, though. USTR can also withdraw or suspend concessions granted under a trade agreement, or negotiate a binding agreement in which the country ends the practice or provides compensation.

Where duties are imposed, they’re additional, sitting on top of the tariff a product already carries. Rates, product coverage, and exclusions vary by action and change over time.

How Do You Know if a Product is Subject to Section 301?

Coming from an affected country is not enough on its own. Coverage is decided action by action, and five things determine it.

1. Which action applies. Section 301 duties exist only under a specific action. Identify which investigation and which Federal Register notice cover the goods in question, because scope, rates, and exemptions differ between them.
2. How the product is classified. Each action names the tariff lines it covers, identified by their Harmonized Tariff Schedule of the United States (HTSUS) subheading. CBP’s position is that “the provisions of the relevant HTSUS subheadings listed in Annex A are controlling for the purpose of determining whether a good is subject to the Section 301 remedy.” This means that the classification of the product, not its description or its end use, decides whether it falls inside the action. Duties are then reported against a Chapter 99 heading at entry.
3. Where the product originates. Section 301 duties are “based on the country of origin, not country of export.” Origin is determined by substantial transformation. Broadly, that is whether the good underwent a fundamental change in form, appearance, nature, or character in the country claiming origin. For goods assembled from components made in several countries, this can be genuinely difficult, and importers can request a binding ruling from CBP rather than guess.
4. When the goods enter. Actions apply to goods entered, or withdrawn from warehouses for consumption, on or after a stated effective date. Goods already in transit are sometimes given a short grace period. The date that counts is the entry date, not the order date or the shipping date.
5. Whether an exclusion applies. Even broad actions carry exemptions. The Section 301 forced labor action, effective July 24 2026, exempts all articles and parts of articles subject to Section 232 tariffs, along with informational materials, donations, and accompanied baggage. It also exempts products meeting stated criteria, including raw materials with no available domestic supply, products not available in sufficient U.S. quantities, and products whose exemption would encourage the adoption of forced labor prohibitions. The full list of exempted products sits in Annexes I and II to the Federal Register notice. Exclusions are claimed at entry using a designated tariff number.

For current rates and product lists on Chinese goods, see Section 301 China tariffs. For exclusion eligibility, extensions, and how to claim one, see Section 301 exclusions. To check a specific tariff line, use the Section 301 tariff lookup.

Section 301 vs. Section 232 and Section 201

Three U.S. statutes produce tariffs, and they’re easy to confuse. They differ in who investigates, what has to be shown, and who decides.

	Section 301	Section 232	Section 201
Statute	Trade Act of 1974 (19 U.S.C. §2411)	Trade Expansion Act of 1962 (19 U.S.C. §1862)	Trade Act of 1974 (19 U.S.C. §2251)
Lead agency	USTR	Department of Commerce	U.S. International Trade Commission (USITC)
Trigger	A foreign practice that breaches a trade agreement, or is unjustifiable, unreasonable, or discriminatory	Imports that impair national security	An import surge causing serious injury to a domestic industry
Who decides	USTR	The President, on Commerce’s report	The President, on the USITC’s recommendation
What it attaches to	A foreign government’s conduct	A product category	A product category

See Section 201 vs. 232 vs. 301 for a fuller comparison.

Current Section 301 Actions and Investigations (as of August 2026)

China, technology transfer and intellectual property. Opened in August 2017, this is the longest-running and best-known action. Four rounds of tariffs ranging from 7.5% to 25% were applied to roughly $370 billion of imports. A statutory four-year review concluded in September 2024, raising rates on targeted goods including electric vehicles to 100% and solar cells to 50%. 

Forced labor across 60 economies. Initiated in March 2026, this is the broadest action taken under the statute. In June 2026, USTR found that 54 economies had no prohibition on forced labor imports, and that six more were not effectively enforcing the prohibitions they had. Additional duties of 10% or 12.5% took effect on July 24, 2026 (91 FR 47318). The action applies to the top 60 U.S. trade partners covering 99.4% of U.S. imports, subject to the exclusions described above. 

Brazil. An investigation opened in July 2025 into digital trade and electronic payment services, preferential tariffs, anti-corruption enforcement, intellectual property, ethanol market access, and illegal deforestation resulted in a 25% action in July 2026.

Open investigations. As of August 2026, USTR has investigations underway into structural excess capacity in manufacturing across 16 trading partners and into Vietnam’s intellectual property protection and enforcement. Neither has produced a determination. Current status is tracked on our Section 301 investigations page.

What Does Section 301 Mean for Procurement and Supply Chain Teams?

Assess exposure action by action, not country by country. The practical question isn’t “are we exposed to Section 301?” but “which action reaches these goods, and on what basis?” That means holding five things together for each part you buy: the applicable action, the product’s tariff classification, its country of origin, the entry date, and any exclusion. Country of origin alone will tell you where to look; it won’t tell you what you owe.

Where an action applies broadly, supplier performance won’t exempt you. Some Section 301 actions reach a country’s goods generally, not a narrow product list. In that case, a supplier with an excellent record still carries the duty, because the finding is about the government’s conduct, not the supplier’s. The forced labor action makes the point plainly: it exempts the products listed in its annexes and establishes no company-specific exclusion process, so relief runs to products and to countries rather than to individual importers or suppliers. You can’t audit your way out of that kind of duty; you manage it through sourcing decisions and product-level analysis. That makes supply chain resilience as much a tariff question as a risk question.

Labor practices are now a tariff variable. The 2026 action treats a government’s failure to prohibit and enforce against forced labor imports as an unfair trade practice. Social due diligence, long treated as a compliance and reputational matter, now sits inside landed cost.

Tariffs and detentions are different problems. A Section 301 duty is a financial cost, determined by classification, origin, and the terms of an action. A shipment detained at the border over suspected forced labor is an operational problem, resolved with site-level evidence about a specific supply chain. Companies increasingly face both, and the same document rarely answers both.

What to build. Map your supply base by country of origin and tariff classification together, so you can test exposure against any new action rather than reconstructing it from scratch each time. Know which suppliers are located in affected economies and at which tier. Then keep verified primary data from those suppliers, so that when you need to demonstrate reasonable care, the record already exists rather than being assembled under pressure. EcoVadis supports this work as a risk management and preparedness layer: sourcing intelligence that shows where supplier relationships are concentrated in affected jurisdictions, and a documented record of Tier 1 supplier engagement that evidences reasonable effort. Determining tariff exposure for a specific product remains a customs classification exercise.

Building a Defensible Record

Section 301 exposure starts with knowing where your goods are made and what’s happening inside those supply chains. Talk to an EcoVadis expert about building a verified supplier record.

FAQs

Is Section 301 still in effect?
Yes, Section 301 is in effect and it’s being used heavily. In June 2026, the Supreme Court declined to hear the principal legal challenge to the China tariffs, leaving them in place after the Federal Circuit upheld USTR’s authority to modify them in September 2025.

Does Section 301 apply to every product from an affected country?
No. Each Section 301 action defines the tariff lines it covers and the applicable exemptions. Coverage depends on the product’s classification, country of origin, entry date, and any exclusions, not the country alone.

What is a Section 301 tariff?
A Section 301 tariff refers to an additional duty imposed under a specific Section 301 action, applied on top of the normal tariff rate for that product. There’s no single Section 301 rate.

Who administers Section 301?
USTR runs Section 301 investigations and decides on action. CBP collects the duties at the border.

Does Section 301 always result in tariffs?
No. USTR may suspend trade agreement concessions or reach a negotiated agreement instead, and may determine that a practice isn’t actionable at all.

Is this the same as “Section 301” in other laws?
No. Several unrelated statutes use the same label, including U.S. labor law and Indian criminal procedure. This page covers Section 301 of the U.S. Trade Act of 1974 only.