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U.S. Department of State

Diplomacy in Action

Nuclear Nonproliferation Treaty


Date: 02/18/2015 Description: NPT logo - State Dept Image

The Treaty on the Nonproliferation of Nuclear Weapons is the cornerstone of the nonproliferation regime. It entered into force in 1970, and 190 states have subscribed. The treaty covers three mutually reinforcing pillars—disarmament, nonproliferation, and peaceful uses of nuclear energy—and is the basis for international cooperation on stopping the spread of nuclear weapons. The basic bargain at the core of the NPT is sound: Countries with nuclear weapons will move towards disarmament; countries without nuclear weapons will not acquire them; and all countries can access peaceful nuclear technology.

Secretary Kerry Delivers Remarks at the 2015 Nuclear Nonproliferation Treaty
United Nations
April 27, 2015

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The NPT Review Process

The Treaty allows for the Parties to gather every five years to review its operation. At the 1995 Review and Extension Conference, the Parties extended the Treaty indefinitely and formalized the practice of convening a Review Conference (RevCon) every five years, as well as holding Preparatory Committee meeting during each of the three years preceding a RevCon. The 2015 NPT RevCon is taking place place at the United Nations in New York now through May 22. The U.S. looks forward to a constructive RevCon, and we pledge to work with others to reaffirm and strengthen the NPT as a critical element of our common security.

Key NPT Remarks and Documents

Key Links and Related Sites

  • Keep up with the 2015 NPT Review Conference events on the United Nations’ website
  • Watch the live stream of NPT Review Conference events here
  • The National Nuclear Security Administration’s NPT compliance page has information about the nuclear security enterprise

Contact Us: Ambassador Adam Scheinman is President Obama’s Special Representative for Nuclear Nonproliferation, and together with offices in ISN and AVC, he leads U.S. efforts in support of the Nuclear Nonproliferation Treaty. Questions and media inquiries should be directed to Sandra Postell at


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