exie%s for this requirement . = —~e-eeficctentty tre priority ad Conclusions Espionage, saootage, cbservation and unauthorised instrumentation are considered most likely to occur under conditions existing today. The declaration of war, overt actien by vessel or aircraft and raids are less likely possitilities which couid take place in the evant of open hostilities betwoen the U.S. and usse__—| mene, 3. Seturity Security of classified information 13 the normal respensibility of any commander but this responsibility must be reevaliua- ted sn Operation CASTLE where the operation i¢ dealing with Atome Energy, a development which played an important fart in terminating World War II and which constitutes such inportancte that it has been reeutated, controlled and protected by Federal iaw. The rossonsibility of each andividual in properly safeguarding classified informa ¢ion concerning atcm.c energy and in preventing 1ts compromise by rareless tain or correspondence must be understo;d by all military ranks and cavil:ans. General Conception. The general conception of the measures to pro- vide security is at follows: & The ENIWETCK-BIKINI area of operations will be cirsed tc all vesseis., aircraft and personnel except thoze participating. Access to this area will be in atcordance with regulations eat ablished by. CIKCPAG Serial 020. All areas within the ENIWETOK BIKINI -cpera. tional area wil be designated in accordance with the degrees of security required. b. Personnel participating in the operation will be cleared fcr loyalty and security an accordance with the varying degrees of re= sponsibility po 3 4 * ¢. The ENTWETOK-BIKINI area of operations is under the eenerai protection of CINCPAC. a. Regulations governing security published by the DOD and AEC continue to apply to members of JTF SEVEN. (1) AR 38%.° and SR 380-6..1 ) CPNAV Instruction $510.1) AFR 20¢-1 GM Security Bulletins ) ) For appropriate units ~ (2) Hq JTP SEVEN Security Memoranda) Espionage Act Atomic Energy Act of 1946 ) ) AEC-DOD classification criteria) Apply to all members of JTF SEVEN e. Task group commanders are responsible for security training of members of their commands All personnel will be required «co pass a basic security examination, prepared and distributed by Headquarters, JTF SEVEN. £. Each basic unit, ship cr detachment particip.ting in Creration CASTLE will have an officer designated as Security Officer, whose primary duties will include security training, enforcement of setu- rity regulations and supervising the administering, grading and acs as