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SECRET- 2 this time, seek their ratification. While continuing observance of the 150-kiloton threshold of these treaties, we should, there- fore, seek Soviet agreement to negotiate effective verification measures in new protocols to the Threshold Test Ban and Peaceful Nuclear Explosions treaties. 1st Over the long term, high yield tests may be necessary to main- tain the U.S. nuclear deterrent. Should an urgent national security need for tests above 150 kilotons be identified in the future, appropriate recommendations should be forwarded to the President for decision. 1st Interdepartmental Group Work Program The Interdepartmental Group should complete a study of specific negotiation proposals on verification procedures designed to improve significantly our verification capabilities. This study should be forwarded to the National Security Council by October 1, 1982. The Interdepartmental Group should prepare an up-to-date net assessment of the effects of the Threshold Test Ban Treaty on the United States/Soviet Union nuclear balance. This assessment should be forwarded to the National Security Council by December 10, 1982. 18 Ronald Reyon SECRET SECABSINIED cy IL of 8 copies