Letter dated 85/07/31 addressed to the President of the Conference on Disarmament from the representative of the Union of Soviet Socialist Republics transmitting the text of the statement made by the General Secretary of the CPSU Central Committee, Mikhail Gorbachev, concerning the announcement by the Soviet Union of a unilateral moratorium on all nuclear explosions from 6 August 1985 to 1 January 1986.