CTBT is a multilateral treaty that bans all nuclear explosions, for both civilian and military purposes, in all environments.
- It was adopted by the United Nations General Assembly on 10 September 1996 but has not entered into force as eight specific states have not ratified the treaty.
- 166 states have ratified the CTBT and another 17 states have signed but not ratified it.
- China, Egypt, Iran, Israel and the United States have signed but not ratified the Treaty.
- India, North Korea and Pakistan have not signed it.
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