(Hare on April 30), May 28, 1976, the United States and the Soviet Union the peaceful use of underground nuclear explosions treaty signed.

1976 28, U.S. President Gerald Ford and the CPSU Central Committee General Secretary Brezhnev signed in Washington and Moscow, "the United States and the Soviet Union peace Underground Nuclear Explosions Treaty, signed an Additional Protocol. The treaty is valid for five years, after the expiration of five years and can be extended. (On TodayOnHistory.com)
treaty provisions: States Parties to peaceful nuclear explosions 150,000 tons in the treaty under testing ground outside their jurisdiction or control anywhere, also may, it is the country within the territory of the country, to participate or assist in the peace following the 15-megaton nuclear explosion. Contracting States shall not be more than 150,000 tons equivalent single peaceful nuclear explosions, nor a combination of peaceful nuclear explosions equivalent of more than 1.5 million tons; party must carry out peaceful nuclear explosions in advance and provide detailed information to each other afterwards. The United States and the Soviet Union has been unable to ratify the treaty.