page_title: Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization
section_title: Verification regime
hierarchical_section_title: Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization / Verification regime
caption_attribution_description: Communication systems at hydroacoustic station HA08, w:en:British Indian Ocean Territory (BIOT), U.K of the International Monitoring System of the w:en:Comprehensive Nuclear-Test-Ban Treaty Organization Preparatory Commission. &lt;a href="http://www.ctbto.org/index.php?id=2276" rel="nofollow"&gt;Copyright CTBTO Preparatory Commission&lt;/a&gt;
context_page_description: The Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization, or CTBTO Preparatory Commission is an international organization based in Vienna, Austria, that is tasked with building up the verification regime of the Comprehensive Nuclear-Test-Ban Treaty Organization. The organization was established by the States Signatories to the Comprehensive Nuclear-Test-Ban Treaty in 1996.
  Its main purpose is twofold: to promote the entry into force of the CTBT, and to establish a global verification regime in preparation for the Treaty's entry into force.
  As the CTBTO Preparatory Commission is an interim organization, it will be dissolved once the CTBT enters into force and will be replaced by the CTBTO, with all its assets being transferred to the CTBTO. This change will occur at the close of the first Conference of States Parties of the CTBT, which will take place when the Treaty has entered into force. For the Treaty to enter into force, the following states need to ratify the CTBT: China, Democratic People's Republic of Korea, Egypt, India, Iran, Israel, Pakistan and the United States of America.
context_section_description: The Preparatory Commission has started building the global systems for the detection of nuclear tests required for the success of the CTBTO. The system consists of the following elements to verify that a nuclear test has occurred: the International Monitoring System, the International Data Centre, a Global Communications Infrastructure, Consultation and clarification, On-Site Inspection and Confidence-building measures.
caption: Communication systems at hydroacoustic station HA08 at British Indian Ocean Territory
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