RESTRICTED GUARD ANNEX DRAFT MESSAGE FROM CHIEFS OF STAFF TO U.S. JOINT CHIEFS OF STAFF Our attention has been drawn to the Presidential Executive Order No. 10501 which came into force on December 15 entitled "Safeguarding Official Information in the Interests of the Defence of the U.S." 2. We have not yet examined in detail the full effect which this Order will have upon the present arrangements for the exchange of classified military information between the U.K. and U.S., but the abolition of the security classification Restricted makes it desirable for urgent agreement to be reached between the U.K.