What provisions are in the nuclear test ban treaty of 1963?

The Partial Nuclear Test Ban Treaty (PTBT) of 1963 prohibits signatory nations from conducting nuclear weapon tests in the atmosphere, underwater, and in outer space, while allowing underground tests. The treaty aims to limit the proliferation of nuclear weapons and reduce environmental contamination. It includes provisions for verification measures, such as the establishment of a system to monitor compliance, although it does not include a comprehensive enforcement mechanism. Notably, the treaty has been signed by over 100 countries, including the United States, the Soviet Union, and the United Kingdom.