The 1997 IAEA Additional
Protocol at a Glance

International Atomic Energy Agency

January 2008

[Press Contacts: Daryl Kimball, (202) 463-8270 x107 or Peter Crail, (202) 463-8270 x102]


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.


The United States signed an additional protocol to its IAEA safeguards agreement in 1998 and ratified 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.” Lawmakers enacted implementing legislation for the protocol on Dec. 18, 2006, but the president has yet to make the required certification.

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 September 2005. The suspension was enacted in response to the IAEA’s determination that Iran was in noncompliance with its safeguards obligations. Iranian officials have stated that Tehran will consider renewing implementation of its additional protocol if its nuclear file is referred back to the IAEA from the UN Security Council. Iran argues that the IAEA is the “sole competent authority” responsible for verifying nuclear safeguards and has asserted that the Security Council interferes with the IAEA’s work by politicizing the nuclear issue.

As of Jan. 22, 2008, 86 NPT states-parties have concluded additional protocols that are now in force. Another 30 states-parties have signed additional protocols. For details see the IAEA Web site at: