The US Supreme Court has struck down tariffs imposed under the International Emergency Economic Powers Act (IEEPA), invalidating the legal foundation for reciprocal tariff arrangements that trade compliance systems have been calculating since their implementation. In response, the administration has imposed temporary 10% global tariffs under Section 122 of the Trade Act of 1974—measures that expire in July, creating an urgent timeline for engineering teams managing duty calculation logic.
The USTR is now conducting fast-track Section 301 investigations to establish replacement tariff authority before the Section 122 deadline. Unlike the invalidated IEEPA framework, Section 301 enables both country-specific and sector-specific tariffs without Congressional approval, meaning compliance systems must prepare for a fundamentally different rate structure than the uniform reciprocal model previously in place.
India faces direct Section 301 scrutiny for what the USTR characterizes as structural excess capacity in three sectors: solar modules, petrochemicals, and steel. With India's 2025 bilateral trade surplus with the US reaching $58 billion, these investigations could result in targeted duty rates that differ significantly from the current 10% baseline. Trade compliance APIs serving HTS data must account for potential sector-specific rates that override general country-of-origin calculations.
The legal framework shift has already disrupted existing trade agreements. Malaysia has declared its US trade agreement null and void. The European Commission has suspended EU-US trade talks pending clarity on the new tariff structure. Countries including Japan, South Korea, Vietnam, Indonesia, and Bangladesh—which had accepted negotiated rates of 15-20% with market access concessions—now face the same 10% temporary rate as non-agreement partners, rendering their concessions economically redundant until the Section 301 framework takes effect.
For compliance engineering teams, the immediate technical challenge involves tracking three concurrent tariff authorities: residual pre-IEEPA rates, the temporary Section 122 10% global tariff, and emerging Section 301 rates as investigations conclude. Country-of-origin determination becomes more complex when sector-specific tariffs apply only to enumerated product categories rather than broad country designations.
The fast-track nature of Section 301 probes—focused on excess manufacturing capacity, export distortions, and forced labor in supply chains—suggests new rates could publish with compressed implementation windows. HTS classification workflows should flag products in investigated sectors (particularly solar components under Chapter 85, petrochemicals across Chapters 27-29, and steel products in Chapter 72) for manual review as investigation findings emerge.
TradeFacts.io maintains current Section 122 rate data and will update endpoints as Section 301 determinations publish. Contact us at /contact.html for a free 30-day trial to ensure your classification systems reflect the evolving tariff framework before the July transition.