UKUSA Agreement Release


Please Note: These historical documents are PDF images of formerly classified carbon paper and reports that have been declassified. Due to the age and poor quality of some of the PDF images, a screen reader may not be able to process the images into word documents. In accordance with Section 504 of the Rehabilitation Act of 1973, as amended, individuals may request that the government provide auxiliary aids or services to ensure effective communication of the substance of the documents. For such requests, please contact the Freedom of Information Act Office at or Public Affairs Office at 443-634-0721.

The tradition of intelligence sharing between NSA and its Second party partners has deep and widespread roots that have been cultivated for almost three quarters of a century. During World War II, the U.S. Army and Navy each developed independent foreign SIGINT relationships with the British and the Dominions of Canada, Australia, and New Zealand. These relations evolved and continued across the decades. The bonds, forged in the heat of a world war and tempered by decades of trust and teamwork, remain essential to future intelligence successes.

The March 5, 1946, signing of the BRUSA (now known as UKUSA) Agreement marked the reaffirmation of the vital WWII cooperation between the United Kingdom and United States. Over the next 10 years, appendices to the Agreement, some of which are included with this release to the public, were drafted and revised. These appendices and their annexures provide details of the working relationship between the two partners and also address arrangements with the other Second Parties (Australia, Canada, and New Zealand).


 MINUTES_INAUGURATION_11MAR46.PDFMinutes of the Inauguration Meeting British Signal Intelligence Conference - 11-27 March 1946
 NEW_UKUSA_AGREE_10MAY55.PDFNew UKUSA Agreement - 10 May 1955
 OP-20-G_TRAFFIC_26JUN44.PDFOP-20-G Dispatch Traffic (Including BRUSA) - 26 June 1944
 TENTATIVE_AGREE_18JAN46.PDFPreparation and Delivery of Drafts of Tentative British-U.S. COMINT Agreement - 18 Jan. 1946
 PRINCIPLES_OF_SECURITY_AND_DISSEMINATION_APPENDIX_B_1_JULY_1959.PDFPrinciples of Security and Dissemination; Appendix B 1 July 1959
 PRINCIPLES_OF_UKUSA_COLLABORATION_WITH_COMMONWEALTH_COUNTRIES_OTHER_THAN_THE_UK_APPENDIX_J_13_FEBRUARY_1961.PDFPrinciples of UKUSA Collaboration with Commonwealth Countries Other Than the UK; Appendix J 13 February 1961.PDF
 SECRUTIY_PRINCIPLES_GOVERNING_THE_CONDUCT_OF_COMINT_OPERATIONS_IN_EXPOSED_AREAS_APPENDIX_B_ANNEXURE_B2_21_MARCH_1960.PDFSecurity Principles Governing the Conduct of COMINT Operations in Exposed Areas; Appendix B; Annexure B2 21 March 1960
 STANCIB_STANCICC_27FEB46.PDFSTANCIB and STANCICC Joint Meeting - 27 Feb. 1946
 STANCICC_14JAN46.PDFSTANCICC Ad Hoc Subcommittee for Technical Conference Planning Establishing of - 14 Jan. 1946
 STANCICC_9JAN46.PDFSTANCICC Subcommittee on Intelligence and Security - 8 Jan. 1946
 TABULAR_COMPARISON.PDFTabular Comparison of 1946 and 1948 Appendices to U.S. - British COMINT Agreement
 THE_ASSIGNMENT_OF_COMINT_TO_CATEGORIES_AND_SUB-CATEGORIES_APPENDIX_D_ANNEXURE_B1_1_JULY_1959.PDFThe Assignment of COMINT to Categories and Sub-Categories; Appendix D; Annexure B1 1 July 1959
 BRUSA_29APR44.PDFThe BRUSA Circuit - Establishment Date - 29 April 1944
 TYPES_OF_INFORMATION_TO_BE_GIVEN_THE_SAME_PROTECTION_AS_COMINT_APPENDIX_B_ANNEXURE_B3_ANNEX_A_1_JANUARY_1959.PDFTypes of Information to be Given the Same Protection as COMINT; Appendix B; Annexure B3; Annex A 1 January 1959
 TYPES_OF_INFORMATION_TO_BE_HANDLED_VIA_COMINT_CHANNELS_ONLY_APPENDIX_B_ANNEXURE_B3_ANNEX_B_1_JANUARY_1959.PDFTypes of Information to be Handled via COMINT Channels Only; Appendix B; Annexure B3; Annex B; 1 January 1959
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