International Emergency Economic Powers Act (1977)

The International Emergency Economic Powers Act (IEEPA) is the principal United States peacetime emergency statute for regulating transactions and property with a qualifying foreign interest. The President may use it only after declaring a national emergency directed at an unusual and extraordinary threat whose source is wholly or substantially outside the United States. IEEPA supplies legal capacity for many sanctions and related controls. It does not create one universal sanctions programme, and each use still depends on its declaration, executive order, regulations, licences and any programme-specific statute.

Legal authority and reach

Congress enacted IEEPA on 28 December 1977 as Title II of Public Law 95-223. Its operative provisions are codified at 50 U.S.C. sections 1701 to 1706. Chapter 35 also contains sections 1707, 1708 and 1709, whose codification notes identify them as separately enacted provisions rather than parts of IEEPA. It separated peacetime emergency economic powers from the wartime Trading with the Enemy Act and tied them to a national emergency under the National Emergencies Act (1976).

The President must identify an unusual and extraordinary foreign-origin threat and may use IEEPA only to deal with it. A declaration opens the legal gateway but does not identify every prohibited transaction. The perimeter comes from the declaration, executive order, regulations, definitions, directives and licences.

Section 1702 authorises investigation, regulation, direction, compulsion, nullification, prohibition and blocking within statutory conditions. Ordinary blocking immobilises property without transferring title. Confiscation and vesting under section 1702(a)(1)(C) additionally require armed hostilities or foreign attack and the prescribed presidential determination.

IEEPA contains qualified exceptions for personal communications, humanitarian donations, informational materials and travel-related transactions. The 1988 and 1994 Berman amendments expanded informational-materials protection. The USA PATRIOT Act added investigatory blocking and the narrower armed-hostilities confiscation power. Each application still requires the exact text and programme rule.

Use in statecraft

President Jimmy Carter first used IEEPA through Executive Order 12170 on 14 November 1979 to block Iranian government property. Later administrations built country and thematic programmes covering terrorism, proliferation, cyber activity, human rights, investment, supply chains and technology. OFAC administers many, but not every OFAC programme rests solely on IEEPA.

IEEPA is a statutory chassis, not a strategy. Congress creates authority; the President declares the emergency and exercises or delegates powers; agencies implement programmes; and covered firms comply as regulated intermediaries. Private de-risking beyond the law is a separate effect.

A declaration establishes the stated threat and purpose, not compellence, degradation or success. CRS reported that on 1 September 2025 presidents had invoked IEEPA in 77 declarations, 46 of 51 ongoing emergencies involved it and the average IEEPA emergency exceeded nine years. These are dated findings, not October 2026 counts.

Doctrine and contested interpretation

Doctrine

IEEPA is positive authority, not a free-standing doctrine. Emergency-power, nondelegation, separation-of-powers, due-process, property and administrative-law doctrines govern disputes.

Contested interpretation

In Dames & Moore v Regan, the Supreme Court upheld specified Iranian asset transfers under IEEPA. It held that IEEPA itself did not authorise the suspension of claims, which it sustained on the broader basis of claims-settlement practice and congressional acquiescence. The opinion expressly limited its conclusion and did not recognise plenary presidential claims-settlement power. In Van Loon v Department of the Treasury, the Fifth Circuit held that the immutable smart contracts before it were not property under the applied Tornado Cash provision. It did not exempt every digital asset, protocol, mixer, person or property interest.

In Learning Resources, Inc. v Trump on 20 February 2026, the Supreme Court held that IEEPA does not authorise presidential tariffs. The Court expressly left the broader boundaries of the power to regulate importation unresolved. The tariff holding does not amount to blanket approval of other controls or decide tariff authority under other statutes.

Reviewed legal position at 24 October 2026

The official Code text reviewed on 24 October is current through Public Law 119-124 of 15 October 2026. IEEPA remains in force in sections 1701 to 1706, with the separate provisions identified above in the same chapter. Reach depends on the foreign-origin threat, emergency and programme instruments. Blocking remains distinct from confiscation and vesting, and statutory exceptions retain their qualifications. This review covers the statutory framework and the judgments discussed here. It does not certify the current prohibitions, licences or continuation of every programme or emergency.

See also

National Emergencies Act (1976) · Trading with the Enemy Act (United States, 1917) · Executive Order 12170 (1979) · Dames & Moore v Regan (US Supreme Court, 1981) · Specially Designated Nationals and Blocked Persons List · Office of Foreign Assets Control (United States) · IEEPA tariff authority under Learning Resources (2025 to 2026) · Van Loon v Department of the Treasury (Fifth Circuit, 2024) · Financial statecraft

Sources

1. International Emergency Economic Powers Act, Pub. L. 95-223, title II, 91 Stat. 1625, 28 December 1977, original enactment.
2. Office of the Law Revision Counsel, 50 U.S.C. chapter 35, section 1701 and section 1702, including amendment notes; separate enactment notes to section 1707, section 1708 and section 1709. Text current through Public Law 119-124, 15 October 2026, checked 24 October 2026.
3. Office of the Law Revision Counsel, 50 U.S.C. section 1621, National Emergencies Act declaration provision, text current through Public Law 119-124, 15 October 2026, checked 24 October 2026.
4. Executive Order 12170, 'Blocking Iranian Government Property', 14 November 1979, 44 Fed. Reg. 65729, National Archives text.
5. Dames & Moore v Regan, 453 U.S. 654 (1981), 670-675 and 687-688, United States Reports opinion.
6. Van Loon v Department of the Treasury, No. 23-50669, United States Court of Appeals for the Fifth Circuit, 26 November 2024, opinion.
7. Learning Resources, Inc. v Trump, 607 U.S. ___ (2026), opinion of 20 February 2026, 14-16 and 20.
8. Christopher A. Casey, Jennifer K. Elsea and Liana W. Rosen, The International Emergency Economic Powers Act: Origins, Evolution, and Use, Congressional Research Service R45618, updated 1 September 2025.
9. House Committee on International Relations, Trading With the Enemy Act Reform Legislation, H.R. Rep. No. 95-459, 95th Cong., 1st sess. (1977).
10. Omnibus Trade and Competitiveness Act of 1988, Pub. L. 100-418, section 2502, 102 Stat. 1107, and Foreign Relations Authorization Act, Fiscal Years 1994 and 1995, Pub. L. 103-236, section 525, 108 Stat. 382.
11. USA PATRIOT Act, Pub. L. 107-56, section 106, 115 Stat. 272, 26 October 2001.
12. Office of Foreign Assets Control, Sanctions Programs and Country Information, checked 24 October 2026.