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The 1997 IAEA Additional Protocol At a Glance
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Contact: Kelsey Davenport, Director for Nonproliferation Policy, (202) 463-8270 x102

Updated: April 2015

The International Atomic Energy Agency (IAEA) began an effort in 1993 to better constrain NPT member-states' ability to illicitly pursue nuclear weapons after secret nuclear weapons programs in Iraq and North Korea exposed weaknesses in existing agency safeguards. That effort eventually produced a voluntary Additional Protocol, designed to strengthen and expand existing IAEA safeguards for verifying that non-nuclear-weapon states-parties to the nuclear Nonproliferation Treaty (NPT) only use nuclear materials and facilities for peaceful purposes. The IAEA is responsible for validating that NPT states-parties are complying with the treaty, which bars all states except China, France, Russia, the United Kingdom, and the United States from acquiring nuclear weapons. India, Israel, and Pakistan have not joined the NPT and possess nuclear weapons.

Iraq, an NPT state-party, successfully circumvented IAEA safeguards by exploiting the agency's system of confining its inspection and monitoring activities to facilities or materials explicitly declared by each state in its safeguards agreement with the agency. To close the "undeclared facilities" loophole, the IAEA initiated a safeguards improvement plan known as "Program 93+2." The plan's name reflected the fact that it was drafted in 1993 with the intention of being implemented in two years.

Putting "Program 93+2" into effect, however, took more time than expected, and the program has subsequently been implemented in two parts. The IAEA, within its existing authority, initiated the first part in January 1996. This first step added new monitoring measures, such as environmental sampling, no-notice inspections at key measurement points within declared facilities, and remote monitoring and analysis. The second part of "Program 93+2" required a formal expansion of the agency's legal mandate in the form of an additional protocol to be adopted by each NPT member to supplement its existing IAEA safeguards agreement. The IAEA adopted a Model Additional Protocol on May 15, 1997.

The Additional Protocol

The essence of the Additional Protocol is to reshape the IAEA's safeguards regime from a quantitative system focused on accounting for known quantities of materials and monitoring declared activities to a qualitative system aimed at gathering a comprehensive picture of a state's nuclear and nuclear-related activities, including all nuclear-related imports and exports. The Additional Protocol also substantially expands the IAEA's ability to check for clandestine nuclear facilities by providing the agency with authority to visit any facility, declared or not, to investigate questions about or inconsistencies in a state's nuclear declarations. NPT states-parties are not required to adopt an additional protocol, although the IAEA is urging all to do so.

The model protocol outlined four key changes that must be incorporated into each NPT state-party's additional protocol.

  • First, the amount and type of information that states will have to provide to the IAEA is greatly expanded. In addition to the current requirement for data about nuclear fuel and fuel-cycle activities, states will now have to provide an "expanded declaration" on a broad array of nuclear-related activities, such as "nuclear fuel cycle-related research and development activities—not involving nuclear materials" and "the location, operational status and the estimated annual production" of uranium mines and thorium concentration plants. (Thorium can be processed to produce fissile material, the key ingredient for nuclear weapons.) All trade in items on the Nuclear Suppliers Group (NSG) trigger list will have to be reported to the IAEA as well. The NSG is a group of 45 nuclear supplier countries that seeks to voluntarily prevent the use of peaceful nuclear technology for military purposes by restricting nuclear and nuclear-related exports.
  • Second, the number and types of facilities that the IAEA will be able to inspect and monitor is substantially increased beyond the previous level. In order to resolve questions about or inconsistencies in the information a state has provided on its nuclear activities, the new inspection regime provides the IAEA with "complementary," or pre-approved, access to "any location specified by the Agency," as well as all of the facilities specified in the "expanded declaration." By negotiating an additional protocol, states will, in effect, guarantee the IAEA access on short notice to all of their declared and, if necessary, undeclared facilities in order "to assure the absence of undeclared nuclear material and activities."
  • Third, the agency's ability to conduct short notice inspections is augmented by streamlining the visa process for inspectors, who are guaranteed to receive within one month's notice "appropriate multiple entry/exit" visas that are valid for at least a year.
  • Fourth, the Additional Protocol provides for the IAEA's right to use environmental sampling during inspections at both declared and undeclared sites. It further permits the use of environmental sampling over a wide area rather than being confined to specific facilities.


The United States signed an additional protocol to its IAEA safeguards agreement in 1998 and the Senate provided its advice and consent to ratify it in March 2004. The Senate, however, conditioned its consent to ratification on the president certifying that appropriate managed access procedures for international inspections are in force. Such procedures are supposed to lessen the danger that inspection may compromise information of “direct national security significance.” Following a lengthy inter-agency process to provide such certifications, the U.S. additional protocol entered into force Jan. 6, 2009.

The United States, along with the IAEA and the Security Council, has called on Iran to resume voluntary implementation of and ratify its additional protocol, which it signed in December 2003, after Tehran stopped adhering to the measure in February 2006. Iran stopped applying the measure days after the IAEA referred it to the UN Security Council. Iran agreed to implement and eventually ratify its additional protocol as part of a comprehensive nuclear deal it is negotiating with the five permanent members of the UN Security Council and Germany. The parties set a June 30, 2015 deadline for reaching an agreement.

As of December 2014, 124 NPT states-parties have concluded additional protocols that are now in force. India, a non-NPT state party also concluded an additional protocol with the IAEA, which was ratified in July 2014.  Another 23 states-parties have additional protocols approved by the agency's Board of Governors, of which 21 have been signed by the states. For details on the entire list of countries see the IAEA Web site here.

Posted: February 4, 2014