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The NPT Review Process

Conferences to review the operation of the Treaty have been held at five-year intervals since the Treaty went into effect in 1970. Each conference has sought to reach agreement on a final declaration that would assess the implementation of the Treaty¡¯s provisions and make recommendations on measures to further strengthen it. Consensus on a Final Declaration was reached at the 1975, 1985, 2000 and 2010 Review Conferences, but could not be achieved in 1980, 1990, 1995, 2005, 2015 and 2022. Differences have centered in particular on the question of whether or not the nuclear-weapon States had sufficiently fulfilled the requirements of Article VI (nuclear disarmament) as well as on issues such as nuclear testing, qualitative nuclear-weapon developments, and security assurances to non-nuclear-weapon States by nuclear-weapon States, as well as over the implementation of the 1995 resolution on the creation of a Middle East Zone free of nuclear weapons and all other weapons of mass destruction.

1995 NPT Review & Extension

The 1995 NPT Review and Extension Conference had two objectives: to review the Treaty¡¯s operation and to decide on its extension. While not being able to agree on a consensus review of the Treaty¡¯s implementation, States parties adopted without a vote a package of decisions. These decisions consisted of (a) elements for a strengthened review process for the Treaty, (b) principles and objectives for nuclear non-proliferation and disarmament, and (c) the indefinite extension of the Treaty; as well as a resolution on the Middle East.

2000 NPT Review

The 2000 Review Conference demonstrated the strength of the new review mechanism and the concept of accountability which had been agreed upon when States parties accepted the ¡°permanence of the Treaty¡± and extended it indefinitely. For the first time in 15 years, States parties successfully concluded their deliberations with agreement on a Final Document that assessed the Treaty¡¯s past performance and on a number of key issues pertaining to nuclear non-proliferation and disarmament, nuclear safety and the peaceful uses of nuclear energy.

The Final Document reaffirmed the central role of the NPT in ongoing global efforts to strengthen nuclear non-proliferation and disarmament and reflected consensus language dealing with virtually all the major aspects of the Treaty. In addition, after noting that the Conference deplored the nuclear test explosions carried out by India and Pakistan in 1998, the Document reaffirmed that any new State party to the Treaty will be accepted only as a non-nuclear-weapon State, regardless of its nuclear capabilities.

The most critical and delicate achievement was the incorporation in the Document of a set of practical steps for the systematic and progressive efforts to implement article VI of the Treaty. These steps provide benchmarks by which future progress by the States parties can be measured. One of the most frequently quoted among them is the nuclear weapon States¡¯ agreement, for the first time, to undertake unequivocally to accomplish the total elimination of their nuclear arsenals leading to nuclear disarmament.

2005 NPT Review

The 2005 Review Conference was unable to reach agreement on a substantive outcome, though States parties were able to engage in useful discussions on a range of issues. Some key disagreements that contributed to this outcome included whether disarmament or non-proliferation should be prioritized and the status of past decisions and agreements, including those reached by the 1995 and 2000 Conferences.

2010 NPT Review

The 2010 Review Conference managed to agree on a 64-point Action Plan covering the three pillars of the Treaty (nuclear disarmament, nuclear non-proliferation and the peaceful uses of nuclear energy), as well as on the Middle East.

2015 NPT Review

The 2015 Review Conference was unable to agree on a substantive outcome, largely due to disagreements over how to move forward on the implementation of the 1995 Middle East resolution. Nevertheless, States parties did engage in forward-looking discussions across the three pillars of the Treaty, including possible measures for the pursuit of nuclear disarmament.

2020 NPT Review - delayed due to COVID

The 2022 Review Conference was supposed to be held in 2020 but was delayed due to the COVID-19 pandemic, was also unable to reach consensus on a final document due to objections regarding language on nuclear safety and security in the context of armed conflict. The Conference did decide to establish a working group on further , which met immediately before the first session of the Preparatory Committee for the 2026 NPT Review Conference. The working group was mandated to discuss and make recommendations to the Preparatory Committee on measures that would improve the effectiveness, efficiency, transparency, accountability, coordination and continuity of the review process of the Treaty.

Working group - strengthening the review process

From 24 to 28 July 2023, the working group on further strengthening the review process of the Treaty held extensive discussions on possible measures to enhance its overall functioning and substantive focus. While it did not reach consensus on a set of recommendations, the group¡¯s deliberations contributed to providing a basis for continued consideration of proposals to improve the operation of the review process in the Preparatory Committee and at future Review Conferences.

History of the Treaty

From the beginning of the nuclear age, and the use of nuclear weapons in Hiroshima and Nagasaki in 1945, it has been apparent that the development of nuclear capabilities by States could enable them to divert technology and materials for weapons purposes. Thus, the problem of preventing such diversions became a central issue in discussions on peaceful uses of nuclear energy. Initial efforts, which began in 1946, to create an international system enabling all States to have access to nuclear technology under appropriate safeguards, were terminated in 1949 without the achievement of this objective, due to serious political differences between the major Powers. By then, both the United States and the former Soviet Union had tested nuclear weapons and were beginning to grow their stockpiles.

1953: Eisenhower's ¡°Atoms for Peace¡±

In December 1953, US President Dwight D. Eisenhower in his ¡°Atoms for Peace¡± proposal, presented to the eighth session of the United Nations General Assembly, urged for an international organization to be established to disseminate peaceful nuclear technology, while guarding against development of weapons capabilities in additional countries.

1957: International Atomic Energy Agency

His proposal resulted in 1957 in the establishment of the (IAEA), which was charged with the dual responsibility of promotion and control of nuclear technology. IAEA technical assistance activities began in 1958. An interim safeguards system for small nuclear reactors, put in place in 1961, was replaced in 1964 by a system covering larger installations and, over the following years, was expanded to include additional nuclear facilities (INFCIRC/66 and revisions).

Comprehensive safeguards agreement

In accordance with the safeguards provisions of the NPT (Article III, paragraph 4), a Comprehensive Safeguards Agreement was developed (INFCIRC/153) to ensure safeguards on ¡°all source or special fissionable material in all peaceful nuclear activities within its territory, under its jurisdiction or carried out under its control anywhere, for the exclusive purpose of verifying that such material is not diverted to nuclear weapons or other nuclear explosive devices¡±. In recent years, efforts to strengthen the effectiveness and improve the efficiency of the IAEA safeguards system culminated in the approval of the Model Additional Protocol (INFCIRC/540) by the IAEA Board of Governors in May 1997. As of 30 June 2025, 144 States have an in force Additional Protocol.

Principle of nuclear non-proliferation

Within the framework of the United Nations, the principle of nuclear non-proliferation was addressed in negotiations as early as 1957 and gained significant momentum in the early 1960s. The structure of a treaty to uphold nuclear non-proliferation as a norm of international behaviour had become clear by the mid-1960s, and by 1968 final agreement had been reached on a Treaty that would prevent the proliferation of nuclear weapons, enable co-operation for the peaceful use of nuclear energy and further the goal of achieving nuclear disarmament. The Treaty provided, in Article X, for a conference to be convened 25 years after its entry into force to decide whether the Treaty should continue in force indefinitely or be extended for an additional fixed period or periods. Accordingly, at the NPT Review and Extension Conference in May 1995, States parties to the Treaty agreed¡ªwithout a vote¡ªon the Treaty¡¯s indefinite extension and decided that review conferences should continue to be held every five years.