K SEC ET less than that recommended because it would mot achieve this result. Mr. Murray indicated his agreement with Mr. Vance’s position. Mr. Libby suggested that the letter to the JCAE be revised to state that a considerable fraction of +Ae information on the project would be declassified rather than that a majority of the information would be declassified. Mir. Strauss referred to Mr. Libby’s previous stitement regarding declassification of the gaseous diffusion principle and inquired whether this declassification had improved the Mr. Libby indicated that he believed it had done so. Mr. Strauss indicated that he believed that since the Russians had probably developed their gaseous diffusion process on the basis of this information he was not certain that it had been desirable. U.S. process. In response to a comment by Mr. Marshall, Mr. Strauss said that he understood that the Commissioners wished to cmisider this matter further if the U.K. suggested more extensive declassification than provided for in A EC 532/34. He also said that since the U.K. had not indicated that it wished to undertake a classified exchange of information on P reject SHERWOOD, that he would first discuss this subject with Sir Edwin Plowden. After further discussion, the Commission, with Mr. Murray, Libby and Mr. Vance voting in the affirmative and Mr. Strauss voting in the negative: Mr. a. Determined that it is desirable to make an immediate approach to the U.K. authorities by appropriate A EC repr es eatatives to collaborate in the preparation of a joint Controlled Thermonuclear Reactor Classification Guide, after the agreement mentioned in b below is executed, and subject to the following con-ditions: (1) That the U.K. agrees to the declassification and classification principles set forth - 575-

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