Menu NPT Home NPT 50th Anniversary Tenth NPT Review Conference 2023 NPT Preparatory Committee HomeNuclear Non-Proliferation Treaty ...2017 Preparatory Committee hide 2017 Preparatory Committee Bureau of International Security and Nonproliferation The 2017 Preparatory Committee (PrepCom) for the 2020 NPT Review Conference (RevCon) took place at the Vienna International Centre from May 2-12 under Chair-designate Ambassador Henk Cor Van der Kwast of the Netherlands. This was the first of three planned sessions to be held prior to the 2020 Review Conference. 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. Working Papers 05/16/17 Working Paper: Common Interests of Parties to the Treaty on the Non-Proliferation of Nuclear Weapons [171 KB] (PDF) Statements 05/12/17 Closing Statement by the United States 05/11/17 United States Statement on the Strengthened Review Process 05/10/17 United States Cluster 3 Statement: Specific Issue 05/09/17 United States Cluster 3 Statement: Peaceful Uses of Nuclear Energy 05/08/17 United States Cluster 2 Statement: Regional Issues 05/08/17 United States Cluster 2 Statement: Nonproliferation 05/05/17 U.S. Statement to the NPT Preparatory Committee – Cluster 1: Disarmament 05/02/17 U.S. Statement to the 2017 NPT Preparatory Committee Tags Arms Control Arms Control and Nonproliferation Nonproliferation Treaties