Congress has passed several Acts which provide a legislative framework for sanctions against Iran. This framework continues to evolve. The most recent bill, the Iran Threat Reduction and Syria Human Rights Act ( ITRSHRA) was signed into law on August 10, 2012, and contains provisions that expand significantly our ability to impose sanctions on Iran and those who facilitate its illicit conduct. It provides for sanctions on activities related to Iran's energy and financial sectors, proliferation of weapons of mass destruction, support for terrorism, as well as activities related to human rights abuses by Iran and Syria.

02/06/13  2013 National Defense Authorization Act (NDAA) Bill: Subtitle D - Iran Sanctions
The Iran Sanctions Act of 1996, as amended (ISA)
The Comprehensive Iran Sanctions, Accountability, and Divestment Act of 2010 (CISADA)
Section 1245 of the 2012 National Defense Authorization Act (NDAA)
Iran Threat Reduction and Syria Human Rights Act of 2012 (ITRSHRA)