Comprehensive Nuclear-Test-Ban Treaty: Background and Current Developments

In 1996, the UN General Assembly adopted the Comprehensive Nuclear-Test-Ban Treaty (CTBT), which would ban all nuclear explosions, but was rejected by the Senate in 1997.

As of October 2011, 182 states had signed the CTBT and 155, including Russia, had ratified it.

However, entry into force requires ratification by 44 states specified in the treaty, of which 41 had signed the treaty and 35 had ratified.

This report provides the recent developments related to the treaty, history, various national positions on nuclear testing and CTBT, CTBT negotiations, provisions, entry into force, CTBTO budget and the nuclear nonproliferation treaty.