What Happened
- The US Supreme Court, in a 6-3 ruling (February 2026), struck down tariffs imposed by President Trump under the International Emergency Economic Powers Act (IEEPA), holding that IEEPA does not authorise the imposition of tariffs.
- The Court ruled that the statute's broad language about "regulating" economic transactions does not encompass the power to tax imports — a power that historically requires Congressional delegation.
- Immediately following the ruling, Trump announced a 10% global tariff on all imports using a different legal authority — Section 122 of the Trade Act of 1974 — and subsequently raised it to 15% the next day.
- Section 122 tariffs are legally capped at 15% and can remain in force for no more than 150 days unless Congress extends them.
- The development signals a significant constraint on executive unilateralism in trade policy and forces a pivot to an alternative but narrower legal instrument.
Static Topic Bridges
The International Emergency Economic Powers Act (IEEPA), 1977
IEEPA was enacted by the US Congress in 1977 to clarify and restrict presidential power relative to the Trading with the Enemy Act of 1917, which had allowed very broad wartime economic controls. IEEPA authorises the President to "regulate" international economic transactions — including blocking, prohibiting, or conditioning transactions — when a national emergency is declared under the National Emergencies Act (NEA). Its primary historical uses were asset freezes, financial sanctions, and trade embargoes against specific countries (Iran, Cuba, Russia), not broad tariff authority. The Supreme Court's ruling in Learning Resources, Inc. v. Trump (2026) held that "regulate" in IEEPA does not extend to tariff-setting, which constitutes taxation and requires explicit Congressional authorisation.
- IEEPA enacted: 1977 (95th Congress, signed by President Carter)
- Triggers: Declaration of national emergency under the National Emergencies Act (NEA)
- Scope: Transactions involving foreign countries or nationals — financial, property, and trade
- Historical uses: Iran hostage crisis sanctions (1979), Cuba embargo codification, Russia sanctions (2022)
- The Court distinguished "regulating" (directing by rule) from "taxing" (imposing a financial burden)
Connection to this news: Trump's tariffs had been imposed citing IEEPA-declared national emergencies (trade deficits, fentanyl). The Supreme Court's ruling invalidated this use and forced reliance on a more restricted statutory alternative.
Section 122 of the Trade Act of 1974: Balance of Payments Authority
Section 122 of the Trade Act of 1974 (codified at 19 USC 2132) grants the President authority to impose temporary import surcharges of up to 15% for up to 150 days to address "fundamental international payments problems" — specifically a large and serious US balance-of-payments deficit or imminent significant dollar depreciation. Congress enacted Section 122 in response to President Nixon's use of the Trading with the Enemy Act to impose a 10% import surcharge in 1971 during the collapse of the Bretton Woods system. Section 122 was designed to codify a narrower, time-limited version of that emergency tariff authority.
- Maximum tariff rate under Section 122: 15% (Trump began at 10%, raised to 15% next day)
- Maximum duration: 150 days (extendable only by Act of Congress)
- Legal trigger: Balance-of-payments deficit or imminent dollar depreciation
- Tariff rate must be uniform across all trading partners — no country-specific differentiation permitted
- First presidential use: Trump in February 2026 (never used before in the law's 50-year history)
- Legal challenge: Trade experts argue the US does not have a true balance-of-payments deficit (it has a capital account surplus)
Connection to this news: The 10% global tariff announced by Trump after the IEEPA ruling is based on Section 122 — a constrained authority with hard caps on rate and duration, significantly limiting the trade policy flexibility Trump previously enjoyed under IEEPA.
WTO Dispute Settlement and Tariff Obligations
The WTO Dispute Settlement Understanding (DSU), established in 1995, provides a binding mechanism for resolving trade disputes between member states. The WTO's "bound tariff" system — under which each member commits to not raising tariffs above negotiated ceilings — forms the backbone of multilateral trade rules. US bound tariff rates (under WTO schedules) average approximately 3.5% for industrial goods. A 10-15% blanket surcharge would arguably violate US WTO obligations, exposing the US to retaliatory authorisation requests from affected countries through the DSU. Historical precedent (Nixon's 1971 surcharge) was imposed before the WTO existed, and was later subjected to GATT dispute proceedings.
- WTO Dispute Settlement Understanding (DSU): Established 1995 under the Marrakesh Agreement
- WTO bound tariff rate: US averages ~3.5% on industrial goods; a 10-15% surcharge far exceeds bound rates
- DSU process: Consultations (60 days) → Panel → Appellate Body → Retaliation authorisation
- WTO Appellate Body: Has been paralysed since 2019 due to US blocking of new judge appointments
- G20 countries, EU, and India have all signalled intent to challenge new tariffs through WTO or bilateral mechanisms
Connection to this news: A 10-15% global US tariff would likely trigger multiple WTO disputes from affected countries, including India — raising questions about the WTO dispute settlement system's capacity to constrain major power unilateralism in trade.
Key Facts & Data
- IEEPA enacted: 1977; Supreme Court struck down its tariff use: February 2026
- Supreme Court vote: 6-3 (Learning Resources, Inc. v. Trump)
- Section 122 tariff announced: 10% (raised to 15% the next day)
- Section 122 cap: 15% rate, 150 days duration
- Section 122 enacted: Trade Act of 1974
- Nixon's 1971 surcharge (precursor): 10% under the Trading with the Enemy Act
- US WTO-bound tariff average (industrial): ~3.5%
- WTO DSU established: 1995 (Marrakesh Agreement)
- WTO Appellate Body paralysed since: 2019