IEEPA: Why the Emergency Law Cannot Authorize Tariffs

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A president can have power to block a foreign transaction yet lack power to tax the import. The International Emergency Economic Powers Act (IEEPA) allows the president to block or regulate transactions involving property in which a foreign country or foreign national has an interest.

The Supreme Court has held that IEEPA does not authorize the president to impose tariffs. An importer cannot treat that ruling as a promise of a duty-free shipment, because separate tariff laws have their own requirements.

What the 1977 emergency law permits

Congress enacted IEEPA in 1977 to limit emergency economic powers previously delegated under the Trading with the Enemy Act. Calling it a tariff law misses the central problem: its broad economic powers are specific powers, not a general permission to impose any economic measure.

IEEPA requires a declared national emergency concerning an unusual and extraordinary threat to national security, foreign policy or the economy whose source is wholly or substantially outside the United States. Its powers may be used only to address the threat identified in that declaration, and a new threat requires a new declaration. These conditions limit the reason for using the law, but satisfying them does not expand the list of available actions.

For persons or property subject to U.S. jurisdiction, IEEPA authorizes actions such as blocking, regulating or prohibiting those transactions. A prohibition and a tariff place different demands on an importer: stopping a transaction is different from charging for permission to complete it.

The Supreme Court emphasized that IEEPA’s list of powers contains no mention of tariffs or duties, and that the power to regulate importation does not fill that gap. The omission matters because a tariff requires its own delegation of taxing authority; a broad verb does not settle that question.

Why the tariff dispute turned on two different powers

On February 1, 2025, President Donald Trump invoked IEEPA to announce tariffs on imports from Canada, Mexico and China, declaring emergencies largely concerning illicit drugs. On April 2, 2025, Trump invoked IEEPA for tariffs of at least 10 percent on imports from almost all U.S. trading partners, with higher country-specific rates, citing lack of reciprocity and persistent annual goods trade deficits. The two sets of measures used different emergency explanations, but they relied on the same claimed tariff power.

In its Supreme Court brief, the federal government argued that regulating foreign trade had historically encompassed tariffs and that IEEPA’s import-regulation language carried that authority into declared emergencies. The government also argued that Congress knew about the appellate decision upholding Richard Nixon’s tariff under the Trading with the Enemy Act when Congress adopted IEEPA. Its reading treated a tariff as a tool within an existing regulatory power, rather than an additional power that needed to be named.

The government pointed to the specified threat, statutory exceptions, emergency time limits and congressional oversight as boundaries on IEEPA authority. On that account, the absence of a numerical tariff cap did not mean the president faced no constraints. The dispute was whether those constraints bounded a power the statute actually granted.

Learning Resources, Inc., a tariff challenger, argued in its response brief that taxing and regulating have distinct meanings: taxes produce government revenue, even when they also influence behavior. Learning Resources argued that Congress clearly delegates taxing power in other customs laws with defined limits, and that the president has no inherent taxing authority simply because foreign affairs are involved. Under that reading, a tariff’s influence on trade cannot substitute for congressional permission to collect the tax.

Learning Resources also disputed the government’s historical argument, contending that a single contested lower-court interpretation of the older law was not settled precedent Congress should be presumed to have adopted.

On February 20, 2026, the Supreme Court affirmed the judgment in Trump v. V.O.S. Selections, Inc., and vacated the judgment in Learning Resources v. Trump, remanding that case for dismissal for lack of jurisdiction. The Supreme Court’s statutory holding was that IEEPA does not authorize presidential tariffs. The jurisdictional dismissal in Learning Resources did not turn the tariff holding into an approval of the challenged duties.

U.S. Customs and Border Protection (CBP) instructed that the covered IEEPA duties would no longer be collected on goods entered for consumption, or withdrawn from warehouse for consumption, on or after midnight eastern time on February 24, 2026. The decision and the collection instructions address related but different steps: the legal authority and the administration of import entries.

Emergency authority has exceptions and oversight

IEEPA excludes personal communications that involve no transfer of anything of value from direct or indirect regulation or prohibition. It also protects imports and exports of information and informational materials, whether commercial or noncommercial and regardless of medium, subject to specified export-control and prohibited-act exceptions. An emergency does not erase these subject-specific limits.

Donations of food, clothing or medicine intended to relieve human suffering are protected, except when the president determines that they would seriously impair the emergency response, respond to coercion against the donor or recipient, or endanger U.S. armed forces engaged in hostilities or facing clearly imminent involvement in hostilities. Transactions ordinarily incident to travel are also excluded, including personal baggage, living expenses, personal goods and services, and arranging travel. The humanitarian exception is therefore qualified, while the travel provision concerns ordinary travel transactions rather than a general exemption for all cross-border business.

The president must consult Congress before exercising IEEPA authority in every possible instance, consult regularly afterward, and immediately report the circumstances, the asserted foreign threat and the planned action when using the authority. After the initial report, the president must report on actions and changed information at least once in every succeeding six-month period. These are oversight duties, not a requirement that Congress preapprove every individual transaction restriction.

Under the National Emergencies Act, an emergency ends on its anniversary unless the president publishes a continuation notice in the Federal Register and sends it to Congress during the preceding 90 days. Congress may end an emergency by enacting a joint resolution, and the president may end it by proclamation, subject to the statute’s preservation of specified prior and pending matters. The president may veto legislation, and an override requires a two-thirds vote in both the House and Senate. A congressional vote opposing an emergency therefore is not necessarily the same as an enacted law ending it. Nor does renewing an emergency cure a missing tariff delegation.

Other tariff laws give different authority

Article I, Section 8 of the Constitution gives Congress the power to lay and collect duties and to regulate commerce with foreign nations. The relevant presidential powers come from the particular authority Congress delegates, so each tariff law needs to be read on its own terms.

Section 232 of the Trade Expansion Act of 1962 requires the commerce secretary to advise the president when an investigation finds imports in quantities or circumstances that threaten to impair national security. The Commerce Department must submit its findings and recommendations within 270 days after the investigation begins. This route ties action to an investigated national-security finding, rather than to an IEEPA emergency declaration.

After receiving a qualifying report, the president has 90 days to decide whether to concur and, if so, determine the nature and duration of the import adjustment; an adjustment the president decides to make must be implemented within 15 days of that decision. Those deadlines govern decision and implementation, rather than setting a single maximum lifespan for every Section 232 tariff.

Section 301 of the Trade Act of 1974 permits the U.S. trade representative to impose duties or other import restrictions against unreasonable or discriminatory foreign practices that burden or restrict U.S. commerce when action is appropriate, subject to specific presidential direction.

Section 201 of the Trade Act permits safeguard tariffs or other action after the U.S. International Trade Commission finds that a surge in imports causes or threatens serious injury to a domestic industry. The purpose of a Section 201 safeguard is to facilitate the industry’s positive adjustment to import competition. This is a domestic-industry injury mechanism, which makes it a different inquiry from national security or an extraordinary foreign emergency.

The balance of payments records transactions between U.S. residents and foreign residents in goods, services, income, assets and liabilities. It therefore measures a broader set of international transactions than the goods trade balance cited in the IEEPA emergency.

Section 122 of the Trade Act addresses fundamental international payments problems, including large and serious U.S. balance-of-payments deficits, and permits an import surcharge of no more than 15 percent for no more than 150 days unless Congress extends the period. A president’s authority under a different law cannot be inferred merely from this law’s existence or from the fact that both measures raise import costs.

Presidents have imposed tariffs through several routes

Examples across administrations show why asking which president imposed a tariff is only the beginning of the explanation. The date, affected imports and legal authority distinguish a historical measure from a charge that can lawfully appear on a later customs entry.

Richard Nixon proclaimed a temporary 10 percent tariff in 1971 to address balance-of-payments problems; an appellate court upheld it under the Trading with the Enemy Act in 1975.

George W. Bush proclaimed steel duty increases and a tariff-rate quota on March 5, 2002, invoking sections 203 and 604 of the Trade Act. A tariff-rate quota allows a specified quantity of a product to enter at a reduced duty rate. Imports beyond that quantity do not receive the quota’s reduced rate.

Barack Obama imposed additional duties on certain passenger-vehicle and light-truck tires from China under sections 421 and 604 of the Trade Act, effective September 26, 2009.

Donald Trump’s first-term steel tariff imposed an additional 25 percent duty effective March 23, 2018, initially excluding Canada and Mexico.

Trump invoked Section 232 national-security authority for that steel action.

Under the Biden-Harris administration, the Office of the U.S. Trade Representative finalized modifications to Section 301 tariffs on China on September 13, 2024, largely adopting the increases proposed that May.

These are examples, not a complete list of American tariff history or a schedule of rates still payable. Nixon’s older-law precedent was part of the IEEPA debate, but the Supreme Court’s later IEEPA holding controls that separate statute.

What the ruling means for an import bill or refund

CBP’s ending-of-collection guidance said the order affected IEEPA duties only and did not affect other duties, including Section 232 and Section 301 duties. The importer of record, the party identified in the entry transaction, is responsible for paying the duties and taxes due on that transaction. Ending one legal charge therefore does not establish that the shipment is duty-free.

CBP provides implementation guidance through its Cargo Systems Messaging Service (CSMS), and a business planning an import may request a binding ruling on matters such as tariff classification, origin, preferential treatment and valuation. Check the legal authority and the shipment’s effective-date instructions before treating a historical percentage as the rate for a new entry. A ruling on how a product is classified answers a different question from whether a president had authority to impose a particular additional duty.

The CBP refund record was checked on October 3, 2026. CBP’s IEEPA refund guidance directs importers of record and authorized customs brokers to submit lists of entries through the Automated Commercial Environment (ACE) Secure Data Portal using its Consolidated Administration and Processing of Entries (CAPE) system. Each CAPE declaration may list up to 9,999 entries, and filers may submit multiple declarations. Refunds are an entry-based customs process, so an importer needs its import records rather than just proof that a tariff once existed.

Liquidation is CBP’s final assessment of duties on an import entry. A reconciliation entry supplies corrected information for elements an importer could only estimate when the original entry was filed.

CAPE Phase 1 covers certain unliquidated entries and certain entries within 80 days of liquidation. Phase 2 accepts entries flagged for reconciliation only if the reconciliation entry has not been filed, and those entries must also be unliquidated or within 80 days of liquidation.

CBP says valid IEEPA refunds generally issue within 60 to 90 days after acceptance of a CAPE declaration unless a compliance concern requires additional review. Extended, suspended, under-review and warehouse entries retain their liquidation status, with validated refunds issued at liquidation. The general processing estimate is not a promise that every entry is eligible or that every refund will arrive on the same timetable.

CBP says it can refund IEEPA duties only to the importer of record or the designated notify party with U.S. bank information in the ACE portal, rather than sending refunds directly to retail consumers who paid higher prices.

The useful next question is consequently more precise than whether the president imposed a tariff: which charge, under which law, on which entry? The emergency declaration cannot answer those questions by itself, and the end of an IEEPA duty cannot erase the separate rules governing the remaining bill.