Section 301 gives 10% tariffs a legal shield

The Trump administration has moved its global tariffs onto a new legal track. The old one failed in court. The new one, built on Section 301 of the Trade Act of 1974, is a trade law that lets Washington impose duties after formally investigating foreign practices it considers harmful to American commerce (White House). The duties took effect on July 24, covering 60 economies. For EU products, the combined tariff generally reaches 10% (Morgan Lewis).

For European exporters shipping €554 billion a year to the United States (Eurostat), the rate itself is not the main concern. What changed is how long these tariffs might now survive legal challenge.

Why this legal route is harder to kill

The Supreme Court struck down the administration's earlier tariffs because they relied on IEEPA (the International Emergency Economic Powers Act), a 1977 emergency-powers law that does not actually grant the power to set tariffs (NPR). A temporary fix under Section 122, a balance-of-payments tool capped at 150 days, bought time while the administration built something sturdier (Thomson Reuters).

Section 301 is that sturdier thing. The US Trade Representative opened 60 investigations in March, accusing each economy of failing to ban imports made with forced labour, collected over 1,600 written comments, and heard testimony from more than 100 witnesses before setting rates (White House). All that paperwork is the strategy. Courts reviewing Section 301 tariffs have to ask whether the government abused a legitimate trade tool, not whether it grabbed the wrong statute entirely (Forbes).

Lawsuits landed within hours. The Liberty Justice Center argues the forced-labour rationale is a pretext to rebuild the global tariff wall courts already rejected (Liberty Justice Center). UCLA tax-law professor Kimberly Clausing called the tariffs "clearly unlawful" (CNBC). But proving abuse of process takes longer than proving the wrong law was used. That makes quick relief unlikely, unless courts accept the pretext argument early.

Who pays, and how the cost travels

The tariff works like a tax at the US border. The American importer pays it, then chooses: absorb the cost, raise consumer prices, or pressure the European supplier to cut its price (Alvarez & Marsal). For European firms, that third option is the one that bites.

The exposure is concentrated. Pharmaceuticals made up 29% of EU exports to the US in 2025. Ireland alone shipped €160.6 billion in pharma to American buyers, nearly 43.8% of all EU pharma exports (Eurostat). PwC Ireland described Irish pharma as temporarily shielded by exemptions, but flagged Trump's threat of 100% tariffs on generics within two years (PwC Ireland). The exemption holds today. Whether it holds next year is the question Irish pharma executives are pricing into their investment plans.

Germany absorbs the hit through its industrial base. The ifo Institute reported that more than 60% of German industrial firms said US tariffs were hurting them, rising to 74% in the automotive sector, where ifo described tariffs as "hampering investment activity" (ifo). That damage does not stay in Germany. When German automakers cut orders and delay model investment, suppliers across central Europe feel weaker volumes. The German auto sector has already shed more than 70,000 jobs in 2024 and over 40,000 in 2025 (Eurofound).

Italy shows what tariff uncertainty does to small firms. Confartigianato, the Italian artisan-business federation, reported that in sectors dominated by micro-firms — food, fashion, furniture — ten months of tariff uncertainty produced an 8.3% drop in US sales (Giornale delle PMI). For a Parmigiano maker, the tariff rate matters less than knowing whether it will still apply when the next container ships.

Duration is the real pressure

A tariff does not need to survive final Supreme Court review to reshape trade. It needs to stay in force long enough to change contract prices, delay factory investments, and push firms to reroute supply chains (FreightWaves). Eurostat data already shows behaviour consistent with this logic: the EU-US goods surplus fell from €81.2 billion in Q1 2025 to €40.8 billion in Q3, a pattern consistent with exporters front-loading shipments ahead of expected tariffs, then pulling back (Eurostat).

By shifting from an emergency proclamation to an administered trade remedy with a thick procedural record, Washington has given itself a legal basis that could keep duties running through years of litigation. For European firms built on predictable transatlantic access, how long they expect the tariff to last now matters more than the rate on the invoice.