DOD be informed that AEC concurrence in the foreign observer participation in the program proposed will be subject to joint agreement of the shot or shots to be observed, joint determination as to the information to be imparted under the provisions of Section l44b of the Atomic Energy Act of 1954, and the measures’ to be taken to limit the dissemination of information to that agreed upon. ll. Due to world-wide public attention on the tests and persistent demands that tests be discontinued, it is felt that public information service representatives of AEC and DOD will be needed throughout the series, The question of news media representations is being dealt with separately. 12, All official observers will have "Q" clearances or other appropriate clearance, Security briefings for all observers will be conducted by the CJTF-7. Each observer will be required to indicate his understanding of his security responsibilities by signing a Certificate of Security Responsibility. The general priefing for observers will be restricted to information within the following scope: weapon effects, size, weight, shape, kind of material used, general description of method of operation of weapon and yield. Specifically excluded will be information revealing the theory of TN design and specific amounts of fissionable and thermonuclear material involved. Less restrictive briefings for selected observers may be arranged by the CJTF-7 as appropriate and in accordance with guidance furnished by DMA, The access which will be afforded foreign observers must be determined by joint agreement of the AEC and DOD. ~ 9- Appendix "A"

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