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             informing the legisi itive debate since 1914



U.S. Sanctions on Iran

Since the Islamic Revolution of 1979, the United States has
used sanctions of various types as key tools of U.S. policy
toward the government of Iran. The U.S. government uses
sanctions to deter, constrain, and encourage change in the
adversarial behavior of the Iranian regime, including its
support for international terrorism, nuclear and missile
development  programs and proliferation activities,
destabilizing regional interventions, and human rights
abuses. Congress has played a leading role in shaping U.S.
policy, enacting legislation to authorize and oversee
successive Administrations' implementation of Iran-related
sanctions. U.S. sanctions have adversely affected Iran's
economy  but Iranian government behavior remains a threat
to U.S. interests and those of partners including Israel.

U.S. sanctions target persons (i.e., entities and individuals)
inside or outside Iran whose actions benefit Iran's
decisionmakers. Primary  sanctions seek to restrict
transactions that U.S. persons conduct with certain Iranian
persons, prescribing civil and criminal penalties for U.S.
persons who violate or evade those restrictions. Secondary
sanctions seek to restrict transactions that non-U.S. persons
conduct with certain Iranian persons, proscribing penalties
such as blocking U.S.-based assets, prohibiting transactions
with U.S. persons, limiting use of U.S. financial
instruments, denying entry into the United States, and
prosecuting sanctions violations and evasions.

U.S. sanctions on Iran are arguably the most extensive and
comprehensive  set of sanctions that the United States
maintains on any country. Thousands of persons (Iranian
and non-Iranian) have been designated for sanctions related
to Iran. Reflecting the complex legal framework of U.S.
sanctions on Iran, many persons have been designated
under multiple authorities; designation under multiple
authorities generally does not confer additional restrictions
but may affect how sanctions may be lifted.

Background
The  1979 overthrow of the Shah (Iran's former ruler and a
staunch U.S. ally) and establishment of the Islamic
Republic initiated decades of animosity between the United
States and Iran. Initially imposed to press for the release of
U.S. Embassy  staff taken as hostages in 1979, U.S.
sanctions in the 1980s and 1990s evolved with the intention
of compelling Iran to cease its support of acts of
international terrorism (including its backing of militants
linked to the 1983 bombings of the U.S. Embassy and
Multinational Force barracks in Beirut) and its pursuit of
chemical, biological, or nuclear weapons capabilities or
advanced  conventional weapons. After the public revelation
in 2002 of previously undisclosed nuclear facilities in Iran,
the United States and allies incorporated sanctions into


July 20, 2023


efforts to persuade Iran to agree to limit its nuclear
activities. The U.N. Security Council, concerned about
Iran's nuclear program, launched multinational sanctions in
mid-2006, requiring member  states to prevent trade with
Iran in goods, services, and technology.

Congressional action has been critical in the development
and expansion of U.S. sanctions on Iran. Congress
authorized sanctions targeting Iran's proliferation activities
beginning in 1992 and, in 1996, enacted landmark
legislation mandating the first secondary sanctions on Iran
on foreign firms involved in the development of Iran's oil
resources (Iran has the world's third largest proven oil
reserves). After the Iranian government's violent
crackdown  on mass protests over its disputed 2009
presidential election, Congress authorized sanctions on
officials responsible for the crackdown and other human
rights abuses. As international concern about Iran's nuclear
program  increased, Congress, beginning in 2010, increased
the scope of U.S. sanctions, targeting Iran's oil exports and
other economic sectors in a bid to deny the Iranian
government  financial resources and compel it to make
policy changes. In enacting these authorities, Congress
mandated  that to waive or lift sanctions, the President must
certify that Iran is meeting certain conditions, including that
the Iranian government has ceased its support of
international terrorism and its proliferation activities.

joint Com  prehensive   Plan of Action  (JCPOA)
Many  experts attribute Iran's decision to enter into the 2015
multilateral agreement known as the JCPOA  to the negative
impact of sanctions on Iran's economy. As part of the
JCPOA,  Iran limited its nuclear activities and subjected
them to additional international inspections and monitoring
in return for relief from many U.S. and international
economic  sanctions. To implement the United States'
commitments  under the JCPOA,  the Obama  Administration
revoked sanctions-related executive orders and exercised
the authority to waive or lift sanctions related to Iran's
nuclear program which the United States had imposed
pursuant to various statutes. U.S. sanctions related to Iran's
continued support for international terrorism, human rights
abuses, and missile development remained in place.
Opponents  of the JCPOA  questioned Iran's trustworthiness
and criticized the agreement for not addressing those
activities; Obama Administration officials argued that
dealing with those Iranian activities would be easier in the
absence of an Iranian nuclear threat.

In 2018, citing the limited duration of certain JCPOA
restrictions and Iran's continued malign activities, the
Trump  Administration ceased U.S. participation in the
JCPOA   and reimposed all U.S. sanctions that had been
eased pursuant to the JCPOA. These and other new

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