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The Comprehensive Nuclear Test Ban Treaty - CTBT

Updated on March 2006

  The Comprehensive Nuclear Test Ban Treaty - CTBT  
The CTBT was declared open for signature in September 1996. It was ratified by France in March 1998. As at June 7, 2004, 171 States had signed the treaty and 113 had ratified it.



Key provisions
  • The ban
    States party to the treaty undertake not to carry out any nuclear weapon test explosion or other nuclear explosion.
  • Conditions of entry into force
    The treaty must be ratified by the 44 States identified as possessing significant nuclear capabilities. Of these, 32 have ratified it.
    India, Pakistan and North Korea have not signed it.
    China, the United States, Algeria, Israel and Iran are among the States that have signed, but not ratified the treaty.
    The USA has declared that it no longer considers ratifying it.
  • Ambivalence of the treaty
    It contributes both to disarmament and non proliferation.
  • Monitoring system
    This is based on a detection network including four types of station: seismic, hydroacoustic, infrasound and radionuclide monitoring.
  • Implementation
    The organization responsible for implementing this treaty (CTBTO) operates in Vienna as a provisional technical secretariat pending the entry into force of the treaty.
    A conference known as the Article XIV Conference is held periodically to promote the entry into force of the treaty.
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