Supreme Court Voids Trump IEEPA Tariffs on Mexico, Replaces with 10 Percent Section 122 Duty

Welcome to Mexico Tariff News and Tracker, where we break down the latest U.S. tariff developments impacting trade with Mexico. In a seismic shift this week, the U.S. Supreme Court ruled 6-3 on February 20 that President Trump's tariffs under the International Emergency Economic Powers Act were unlawful, invalidating the country-specific duties on Mexico tied to immigration and opioids, according to First Trust Advisors' economic research. Chief Justice Roberts wrote that IEEPA doesn't grant tariff authority, scrapping those sweeping measures overnight. President Trump responded swiftly with an Executive Order rescinding IEEPA collections effective February 24, as confirmed by U.S. Customs and Border Protection's Cargo Systems Messaging Service. But relief was short-lived: he imposed a new 10% across-the-board tariff under Section 122 of the Trade Act of 1974, starting the same day, with threats to hike it to 15%—the statutory max—within hours, per PwC Tax Insights and Maillie reports. For Mexico, the news is mixed. Pre-ruling effective rates hit around 13-15% overall, but USMCA-compliant goods dodge the new surcharge entirely, giving compliant Mexican exporters a competitive edge, as Texas State Rep. Janie Lopez noted in RFD-TV coverage. Non-compliant items face the 10-15% hit, while Bloomberg Economics charts show Mexico's rate dropping from highs near 20% under IEEPA. Even if Section 122 expires after 150 days, Tax Foundation projects a 2026 average effective rate of 5.6%, highest since 1972. Refunds loom large: IEEPA tariffs generated $170 billion potentially reimbursable, a windfall for importers, First Trust estimates. Amid this, U.S. and Mexico unveiled a 60-day plan for coordinated critical minerals trade policies, including price floors and supply chain resilience, per SME report—no Canada mention, despite USMCA ties. USMCA talks heat up, with duty-free flows intact for compliant goods, Hellenic Shipping News reports, but Section 301 probes loom on unfair practices. Cartel violence adds agricultural trade risks, RFD-TV warns. Mexico watchers: monitor CBP guidance, compliance, and that 150-day clock. Thanks for tuning in, listeners—subscribe for weekly updates. This has been a Quiet Please production, for more check out quietplease.ai. For more check out https://www.quietperiodplease.com/ Avoid ths tariff fee's and check out these deals https://amzn.to/4iaM94Q This content was created in partnership and with the help of Artificial Intelligence AI.