Section 301

Section 301 of the US Trade Act of 1974 gives the US Trade Representative (USTR) authority to investigate foreign trade practices deemed unfair or discriminatory toward US commercial interests and to impose tariffs or other trade restrictions in response. First invoked in the 1980s against Japan, it was the primary vehicle for $360 billion in tariffs on Chinese goods in 2018-2019 under the first Trump administration. In 2025 the USTR opened a fresh investigation naming the EU Digital Markets Act's enforcement actions against Apple and Meta as "discriminatory targeting" of US companies, marking the first time the statute was weaponised as a direct counter to foreign digital regulation .

The statute operates in three phases: investigation (initiated by USTR petition or self-initiation), consultation with the foreign government, and determination. A finding of "unreasonable" or "discriminatory" conduct triggers a mandatory USTR recommendation to the President on retaliatory measures. In the EU-tech context the USTR investigation named both the DMA fines on Apple (€500m) and Meta (€200m) and the cloud gatekeeper probes against Amazon and Microsoft as actionable conduct .

The current determination deadline of 24 July 2026 sits inside a nine-day regulatory collision with two Brussels milestones: the Commission's binding DMA decision on Google search-data sharing on 27 July and EU AI Act GPAI enforcement activation on 2 August . No published coordination between Washington and Brussels has been announced. A positive Section 301 determination could trigger retaliatory tariffs on EU goods — the same economic lever used in the 2018 China dispute — turning a regulatory disagreement into a full trade confrontation at the same moment Brussels is asserting its most ambitious tech oversight to date.