<P> The PTBT was signed by the governments of the Soviet Union , United Kingdom , and United States in Moscow on 5 August 1963 before being opened for signature by other countries . The treaty formally went into effect on 10 October 1963 . Since then , 123 other states have become party to the treaty . Ten states have signed but not ratified the treaty . </P>
<P> The PTBT was signed by the governments of the Soviet Union , United Kingdom , and United States in Moscow on 5 August 1963 before being opened for signature by other countries . The treaty formally went into effect on 10 October 1963 . Since then , 123 other states have become party to the treaty . Ten states have signed but not ratified the treaty . </P>
where was the nuclear test ban treaty signed
where was the nuclear test ban treaty signed
Moscow
Moscow