About the PreparAtory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization


The Preparatory Commission for the Comprehensive Nuclear Test-Ban Treaty Organization (CTBTO)  is an international organization established by the States Signatories to the Treaty on 19 November 1996 and has its headquarters in Vienna, Austria. The objective of the organization is to achieve the object and purpose of the Treaty, to ensure the implementation of its provisions, including those for international verification of compliance with the Treaty, and to provide a forum for consultation and cooperation among Member States.  To this end, the Commission prepares for the entry-into-force of the Treaty and carries out the necessary preparations for the effective implementation of the Treaty, including the establishment of a global verification regime.  The Preparatory Commission consists of a plenary body composed of all States signatories to the Treaty and a Provisional Technical Secretariat. 

Relationship agreement between the United Nations and the CTBTO PrepCom

General Assembly Resolution A/RES/54/280

Conferences on Facilitating the Entry into Force of the CTBT



Latest developments

Joint Ministerial Statements on the CTBT

Text of the CTBT

Status of the Treaty