This map layer shows the states parties to the Comprehensive Nuclear Test Ban Treaty.
The Comprehensive Nuclear-Test-Ban Treaty outlaws nuclear test explosions, whether ostensibly for military and civil purposes, and any assistance given. The treaty has been open for signatures since 1996, but it requires ratification from all the states operating nuclear research reactors in 1995 before becoming legally effective. There are 44 such states listed in Annex 2 to the Treaty. Of these, Egypt, China (PR), India, Iran, Israel, North Korea, Pakistan and the United States have not yet ratified.
Treaty states must prohibit and prevent any kind of test within territories under their jurisdiction. There is some dispute over whether subcritical nuclear tests are also banned. Compliance with the Treaty is overseen by the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) by means of an international monitoring system consisting of forensic seismic, hydroacoustic, infrasound and radionuclide sensors.
Members of each ABC / NBC weapons agreement 2018
The graph shows the number of members of each NBC arms control agreement (early 2018).
Sources: UNODA 2018, OPCW 2018, CTBTO 2018
© picture-alliance / dpa
Scope for ensuring compliance with arms control agreements
Disarmament and arms control agreements often, though not always, contain provisions on how implementation and compliance by the signatory states should be checked.
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