Since August 1996, the Iran-Libya Sanctions Act (ILSA) has imposed mandatory and discretionary sanctions on non-U.S. companies that invest more than $20 million annually (lowered in August 1997 from $40 million) in the Iranian Oil and Natural Gas sectors. On August 3, 2001, President Bush signed into law the ILSA Extension Act of 2001.
This provided for a 5-year extension of ILSA with amendments that affect certain of the investment provisions. In addition, the United States has maintained various sanctions against Iran since 1979, following the seizure of the U.S. embassy in Tehran on November 4 of that year. In 1995, President Clinton signed two Executive Orders prohibiting U.S. companies and their foreign subsidiaries from conducting business with Iran.
Executive Order 12957 specifically banned any "contract for the financing of the development of Petroleum resources located in Iran." On March 10, 2005, President Bush extended sanctions for another year, citing Iran's "continued support for terrorism, its efforts to undermine the Middle East peace process and its efforts to acquire weapons of mass destruction."
In April 2004, the United States removed Libya from the ILSA sanctions, following fulfillment of that country's commitments to rid itself of weapons of mass destruction and to renounce terrorism. On September 20, 2004, the President signed an executive order terminating the national emergency (declared in Executive Order 12543 of January 7, 1986), with respect to the policies and actions of the Government of Libya, revoking Executive Order 12544 of January 8, 1986 and Executive Order 12801 of April 15, 1992, all of which imposed sanctions against Libya in response to the national emergency.
The new September 2004 executive order also revokes Executive Order 12538 of November 15, 1985, which prohibited the importation into the United States of petroleum products refined in Libya. This lifting of sanctions has opened the door to a potential return of U.S. oil companies to Libya for the first time in nearly 20 years.
Besides Iran, the United States maintains sanctions on two other oil producing nations - Sudan and Syria. For more information on these sanctions, please see EIA's Global Energy Sanctions report.