Parameters of the tentative Iran nuclear deal

Updated 1856 GMT (0256 HKT) April 2, 2015

After arduous talks that spanned 20 months, negotiators reached a landmark deal aimed at reining in Iran's nuclear program, announced on July 14. From left, European Union High Representative for Foreign Affairs and Security Policy Federica Mogherini, Iranian Foreign Minister Mohammad Javad Zarif, Head of the Iranian Atomic Energy Organization Ali Akbar Salehi, Russian Foreign Minister Sergey Lavrov, British Foreign Secretary Philip Hammond and U.S. Secretary of State John Kerry pose for a group picture at the United Nations building in Vienna on July 14.
Photos: Iran: Key players in the nuclear talks
After arduous talks that spanned 20 months, negotiators reached a landmark deal aimed at reining in Iran's nuclear program, announced on July 14. From left, European Union High Representative for Foreign Affairs and Security Policy Federica Mogherini, Iranian Foreign Minister Mohammad Javad Zarif, Head of the Iranian Atomic Energy Organization Ali Akbar Salehi, Russian Foreign Minister Sergey Lavrov, British Foreign Secretary Philip Hammond and U.S. Secretary of State John Kerry pose for a group picture at the United Nations building in Vienna on July 14.
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U.S. Secretary of State John Kerry has been spearheading negotiations on a possible deal to rein in Iran's nuclear program.
Photos: Iran: Key players in the nuclear talks
U.S. Secretary of State John Kerry has been spearheading negotiations on a possible deal to rein in Iran's nuclear program.
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Kerry, second from left, meets Iranian Foreign Minister Mohammad Javad Zarif, second from right, for talks in Lausanne, Switzerland, on Monday, March 16. At the far left is U.S. Secretary of Energy Ernest Moniz. At the far right is Ali Akbar Salehi, head of Iran's Atomic Energy Organization.
Photos: Iran: Key players in the nuclear talks
Kerry, second from left, meets Iranian Foreign Minister Mohammad Javad Zarif, second from right, for talks in Lausanne, Switzerland, on Monday, March 16. At the far left is U.S. Secretary of Energy Ernest Moniz. At the far right is Ali Akbar Salehi, head of Iran's Atomic Energy Organization.
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Iranian Supreme Leader Ayatollah Ali Khamenei meets with environmental officials in Tehran, Iran, on Sunday, March 8.
Photos: Iran: Key players in the nuclear talks
Iranian Supreme Leader Ayatollah Ali Khamenei meets with environmental officials in Tehran, Iran, on Sunday, March 8.
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Iranian President Hassan Rouhani speaks in September during a news conference in New York.
Photos: Iran: Key players in the nuclear talks
Iranian President Hassan Rouhani speaks in September during a news conference in New York.
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Wendy Sherman has been a key U.S. negotiator in the Iran talks. She is the under secretary of state for political affairs.
Photos: Iran: Key players in the nuclear talks
Wendy Sherman has been a key U.S. negotiator in the Iran talks. She is the under secretary of state for political affairs.
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Federica Mogherini, foreign policy chief for the European Union, has been representing the Europeans in nuclear talks with Iran.
Photos: Iran: Key players in the nuclear talks
Federica Mogherini, foreign policy chief for the European Union, has been representing the Europeans in nuclear talks with Iran.
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Iran's parliament speaker Ali Larijani listens to a question during a news conference in Tehran on March 16.
Photos: Iran: Key players in the nuclear talks
Iran's parliament speaker Ali Larijani listens to a question during a news conference in Tehran on March 16.
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Yukiya Amano is director general of the International Atomic Energy Agency, the U.N.'s nuclear watchdog.
Photos: Iran: Key players in the nuclear talks
Yukiya Amano is director general of the International Atomic Energy Agency, the U.N.'s nuclear watchdog.
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Iran and world powers comprising the P5+1 negotiating team meet in Montreux, Switzerland, on Thursday, March 5.
Photos: Iran: Key players in the nuclear talks
Iran and world powers comprising the P5+1 negotiating team meet in Montreux, Switzerland, on Thursday, March 5.
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Details of the Iran deal as provided by the U.S. government.

(CNN)Parameters for a Joint Comprehensive Plan of Action regarding the Islamic Republic of Iran's Nuclear Program

Below are the key parameters of a Joint Comprehensive Plan of Action (JCPOA) regarding the Islamic Republic of Iran's nuclear program that were decided in Lausanne, Switzerland. These elements form the foundation upon which the final text of the JCPOA will be written between now and June 30, and reflect the significant progress that has been made in discussions between the P5+1, the European Union, and Iran. Important implementation details are still subject to negotiation, and nothing is agreed until everything is agreed. We will work to conclude the JCPOA based on these parameters over the coming months.
    Enrichment
      • Iran has agreed to reduce by approximately two-thirds its installed centrifuges. Iran will go from having about 19,000 installed today to 6,104 installed under the deal, with only 5,060 of these enriching uranium for 10 years. All 6,104 centrifuges will be IR-1s, Iran's first-generation centrifuge.
      • Iran has agreed to not enrich uranium over 3.67 percent for at least 15 years.
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      • Iran has agreed to reduce its current stockpile of about 10,000 kg of low-enriched uranium (LEU) to 300 kg of 3.67 percent LEU for 15 years.
      • All excess centrifuges and enrichment infrastructure will be placed in IAEA monitored storage and will be used only as replacements for operating centrifuges and equipment.
      • Iran has agreed to not build any new facilities for the purpose of enriching uranium for 15 years.
      • Iran's breakout timeline -- the time that it would take for Iran to acquire enough fissile material for one weapon -- is currently assessed to be 2 to 3 months. That timeline will be extended to at least one year, for a duration of at least ten years, under this framework.
      Iran will convert its facility at Fordow so that it is no longer used to enrich uranium
      • Iran has agreed to not enrich uranium at its Fordow facility for at least 15 years.