Operation Plan CTG 7.3 No. 1-53 Change #4 c. 3604, Mail Issues by RPIO's. ‘when necessary to request publi- cations by message, ships of TG 7,3 shall address such reauest to NavComSta Pearl Harbor, (RPIO). Delivery will be made by Officer Messenger Mail to the OMMC Parry Island, or OMM Sub-Center at Eninman Island as appropriate. All T 7.3 holders shall furnish a copy of Sections III and V of RPS 10(A) to NavComSta Pearl Harbor (RPIO prior to arrival at Fniwetok. ad. 3664, Autyorization of Cryptoboard Members, Theprocedure for authorizing cryptoboard members is set forth in TG 7.3 Instruction 5521,1 dated 28 Aug., 1953, In addition to the clearance required therein, cryptoboard members should be designated in writing to handle crypto material in accordance with Art. 3664, USF 70(B). DNA aa F-Sa Change #4