"While continuing previous U.S. Administrations' policies of containing Iran while pursuing limited engagement with it, the Bush Administration is evaluating whether or not to move more toward a regime change policy, and how to prevent Iran from obtaining nuclear weapons capability. Iran's efforts to acquire weapons of mass destruction and delivery means, coupled with its support of terrorist groups, have long been key U.S. concerns. Another U.S. concern is that Iran continues to provide material support to Hizballah in Lebanon and to Palestinian groups that oppose the Arab-Israeli peace process. Iran's human rights practices are frequently criticized by U.S. officials and Members of Congress. Thus far, the Bush Administration has continued most aspects of the containment policies toward Iran that characterized preceding administrations. The United States has consistently worked with its allies to prevent arms and advanced technology sales to Iran and to limit Iran's influence over regional energy flows. U.S. purchases of Iranian crude oil and U.S. company investments in Iran remain barred. The Iran-Libya Sanctions Act (ILSA) was renewed for another 5 years on August 3, 2001 (H.R. 1954, P.L. 107-24)."
CRS Issue Brief for Congress, IB93033