The International Emergency Economic Powers Act (IEEPA), Title II of Pub. L. 95–223, 91 Stat. 1626, enacted October 28, 1977, is a United States federal law authorizing the president to regulate international commerce after declaring a national emergency in response to any unusual and extraordinary threat to the United States which has its source in whole or substantial part outside the United States. The act was signed by President Jimmy Carter on December 28, 1977.