International Emergency Economic Powers Act
law & sanctions. Also IEEPA
A 1977 US law that lets the President, after declaring a national emergency over an unusual and extraordinary foreign threat, block assets and regulate transactions. It underpins most US sanctions programmes, including the counter-terrorism designations under Executive Order 13224. It was also used for the 2025 “reciprocal” tariffs, but on 20 February 2026 the Supreme Court held, six to three, that it does not authorise tariffs.12
Linked from 3 pages across CUPA.
Sources
- US Supreme Court holds IEEPA does not authorize tariffs. DLA Piper, 2026-02. Reference
- SDGT Designation Briefer. American Civil Liberties Union. Reference
