Why USTR’s Latest Section 301 Actions Matter for Your Supply Chain

In the wake of the US Supreme Court’s decision invalidating the US administration’s use of the International Economic Emergency Powers Act (IEEPA) to levy tariffs, the Office of the United States Trade Representative (USTR) initiated expansive Section 301 investigations into structural excess capacity and failure to prevent manufacture and importation of goods made with forced labor across key global manufacturing sectors, signaling a new wave of potential tariffs and trade restrictions that could materially affect supply chains, sourcing strategies, and cost structures. With an April 15, 2026 deadline for comment, importers are encouraged to identify the impact of these pending investigations and take steps to address their potential tariff and trade exposure.

Announced March 12, 2026, the investigations span a wide range of major US trading partners and reflect a broader policy shift toward using trade tools to address perceived global imbalances and support domestic manufacturing. The development introduces a new round of uncertainty around pricing, procurement, and investment planning, while creating a narrow window to influence potential outcomes through the administrative process.

SCOPE, POLICY CONTEXT, AND ENFORCEMENT DIRECTION

Section 301 of the Trade Act of 1974 authorizes the United States to investigate and respond to foreign practices that are considered unreasonable or discriminatory and that burden US commerce. The statute provides significant discretion to act even where the conduct at issue does not violate international trade agreements. USTR has initiated investigations and requested consultations with the identified economies, as well as requested public comments in advance of scheduled public hearings.

The excess capacity investigation targets a broad group of economies, including China, the European Union, Japan, India, Mexico, Korea, and several Southeast Asian jurisdictions, reflecting a systemic approach rather than a focus on a single country or practice. USTR characterizes the issue as structural excess capacity, meaning production capacity that exceeds demand and is sustained not through market forces, but through government intervention like subsidies, state-directed financing, and regulatory frameworks that promote production while suppressing domestic consumption. According to USTR, these conditions contribute to persistent overproduction, large trade surpluses, and export-driven growth models that displace US production or deter domestic investment.

USTR separately initiated an investigation into 60 economies to determine whether the countries failed to impose and effectively enforce a ban on the importation of goods produced with forced labor in a way that is unreasonable or discriminatory or burdens or restricts US commerce. The 60 identified economies comprise the United States’ top 60 sources of goods imported in 2024, which USTR states account for 99% of all goods imported that year. The investigation includes many economies that have adopted or implemented forced labor prohibitions—like the EU, Canada, and Mexico—as well as trading parters that have committed to such prohibitions in the US administration’s framework trade agreements. USTR alleges that these countries have not yet adopted or effectively enforced a prohibition on imports produced with forced labor.

The investigations span trading partners with prominent sectors central to global supply chains, including steel, automobiles, semiconductors, batteries, chemicals, and machinery, suggesting that any resulting measures could have broad, cross-industry effects. The inclusion of both key competitors and allies underscores a broader shift toward addressing structural features of the global trading system and signals a more expansive use of Section 301 as part of US industrial policy. This approach aligns with a wider trend toward assertive, unilateral trade measures, including tariffs, export controls, and investment restrictions, contributing to a more complex and less predictable environment for multinational businesses.

USTR has indicated that it intends to conduct these investigations on an expedited basis, aiming to conclude before July 24, 2026, which is also the expiration date of the Section 122 10% tariffs the US administration imposed following the Supreme Court decision that IEEPA does not authorize the imposition of tariffs.

KEY RISKS FOR BUSINESSES

The investigations introduce several risks for companies engaged in cross-border trade, manufacturing, or investment.

Tariff and Trade Remedy Exposure

A primary risk for companies is the potential for new or expanded tariffs affecting a wide range of products and jurisdictions. Given the breadth of economies under review, any resulting measures could increase input costs across multiple layers of the supply chain rather than being confined to specific goods.

Recent experience indicates that tariff measures can be implemented with limited lead time and may evolve in scope, creating ongoing uncertainty for pricing strategies, margin management, and contractual performance.

Supply Chain Disruption and Reconfiguration

The investigations may accelerate disruption across global supply chains, particularly for companies with manufacturing or sourcing concentrated in affected jurisdictions. Businesses may need to reassess production footprints, supplier relationships, and logistics strategies in response to new trade barriers.

Even where direct exposure is limited, indirect effects through upstream suppliers or downstream market shifts may be significant. USTR’s focus on alleged transshipment suggests that supply chain structures themselves may face increased scrutiny.

Indirect and Downstream Effects

Companies that are not direct importers of affected goods may nonetheless experience meaningful commercial impacts. These may include cost increases driven by upstream component pricing, competitive pressures resulting from trade diversion, or shifts in customer demand due to changing market conditions.

The global nature of manufacturing supply chains means that trade measures imposed in one segment can cascade across industries and geographies.

Enforcement and Compliance Risk

Trade enforcement risk is likely to increase alongside any new measures. Customs authorities may heighten scrutiny of classification, valuation, and country-of-origin determinations, particularly in sectors identified as vulnerable to circumvention.

At the same time, enforcement authorities are increasingly leveraging other tools, including the False Claims Act, to pursue alleged tariff evasion or misstatements in import documentation. Companies should expect a more active and coordinated enforcement environment.

PRACTICAL NEXT STEPS

Companies should consider taking a structured approach to evaluating and responding to these developments.

• Assess Exposure: Companies should begin by identifying their exposure to the investigations across products, inputs, and business lines, including evaluating direct imports from affected jurisdictions as well as indirect dependencies within the broader supply chain.
• Evaluate Contractual Protections: Existing contractual arrangements should be reviewed to determine how tariff risk and cost increases are allocated. Companies may wish to consider whether price adjustment mechanisms, tariff allocation clauses, or other protections are sufficient in the current environment.
• Consider Participation in the Proceedings: Participation in the USTR process may be warranted for companies with significant exposure or strong views on the issues under investigation. Written comments and requests to appear at the hearings must be submitted to the USTR portal by April 15, 2026 at 11:59 pm EST. [1]
• Strengthen Trade Compliance: Companies should review their trade compliance frameworks to ensure they are aligned with heightened enforcement expectations, including evaluating internal controls, documentation practices, and training programs. The Department of Justice Trade Fraud Task Force has continued to emphasize customs and tariff fraud as top enforcement priorities.

OUTLOOK

These investigations represent a significant escalation in the use of Section 301 and signal that trade policy and tariffs will continue to play a central role in shaping the operating environment for multinational businesses. The breadth of the inquiries suggests that any resulting measures could have wide-ranging and potentially long-lasting effects. As the process unfolds, companies should monitor developments closely, engage where appropriate, and integrate trade policy considerations into broader business planning.