Between 2003 and 2007 the US Treasury Department brought litigation against 94 companies for violating the ban against trade and investment in Iran. The State Department imposed sanctions 111 times against foreign entities that engaged in proliferation or terrorism-related activities with Iran. And both departments have used their power to freeze financial assets or access to the US financial system.
联合国有针对性的制裁未能奏效并不出人意外。美国多年来一直推动制裁。2003年至2007年间，美国财政部对49家违犯禁令与伊朗贸易并在该国投资的公司提起诉讼。美国国务院对参与伊朗扩散或者与恐怖主义有关活动的外国实体实行了111次的制裁。这两个部门都使用了其权力来冻结金融资产或者禁止使用美国的金融系统。