33(1)(b)

contains information or matter: (i) that was communicated in confidence by, or on behalf of, a foreign government, an authority of a foreign government or an international organisation (the foreign entity) to the Government of the Commonwealth, to an authority of the Commonwealth or to a person who received the communication on behalf of the Commonwealth or an authority of the Commonwealth (the Commonwealth entity); and (ii) which the foreign entity advises the Commonwealth entity is still confidential; and (iii) the confidentiality of which it would be reasonable to maintain
— Section 33(1)(b) of the Archives Act 1983

425

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61

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48

series

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26.614117647058823

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Here's some examples of closed files that cite this reason…

Series Control Symbol Title Contents dates
A816 25/301/554 [Intelligence] [modified title, original item title partially exempt] Reports 1953 - 1956
A816 14/301/540 Probable form and scale of attack against Malaya - Joint Intelligence assessment 1953 - 1954
A12391 R13 Soviet Intelligence Operations Against Americans and US Installations Abroad: An Analysis of Soviet Doctrine and Practice 1968 - 1968
A1533 1957/3549 FALLIS, Herbert Elmer - Alleged counterfeiting of US currency 1958 - 1959
A1838 TS694/2/3/4 PART 4 [Modified title: Exchange of information] 1970 - 1970
A1533 1967/182 Traffic in gold stolen from Canadian mines and RCMP booklet 1967 - 1969
A1209 1957/4254 ANZUS Council meeting - Washington, November 1956 1956 - 1956
A12389 BB5 The [portion of title exempt] Case - January 1975 1969 - 1975
A5954 1727/20 Gibraltar as a link in Imperial Communications - Problem of Establishing an Air Base, Nov 1936 1936 - 1936
A5954 2366/10 Area of responsibility of Joint Intelligence Bureau (Melbourne) 1953 - 1953
AWM54 179/5/8 PART 4 [Chemical Warfare - Trials:] Munitions Supply Laboratories. Abstract reports indexed in records of Chemical Defence Board [Part 4 of 23] 1944 - 1944
A9511 DNIS 1-13 Intelligence requests for information 1958 - 1968
AWM54 179/5/8 PART 2 [Chemical Warfare - Trials:] Munitions Supply Laboratories. Abstract reports indexed in records of Chemical Defence Board [Part 2 of 23] 1944 - 1944
A3411 51 South-East Asia Treaty Organisation. Supplement to the Report of the Council Representatives to the Council, March 1957 1957 - 1957
A9954 SE/12/D24 Agenda item 2a. The nature and extent of the Communist subversive and insurgent threats to the Treaty area. Collated paper presented by the United Kingdom 1959 - 1959
A1838 TS205/11/27 Syria relations with Saudi Arabia 1957 - 1957
A5799 14/1958 Australia, New Zealand and the US - Military talks on Indonesia [Contains folio notice advice only] 1958 - 1958
A2031 272/1953 Strategic planning in relation to British Commonwealth Defence - probable form and scale of attack against and within the ANZAM region to mid 1955. 1953 - 1953
A1838 TS686/4 PART 3 Regional Defence. Pacific, East and South East Asia. ANZUS military machinery. (ANZUS Staff Planners, Military Advisers, etc.) [64pp] 1953 - 1955
AWM54 179/3/3 PART 7 [Chemical Warfare - Types of Agents:] Canada, Sub-Committee on Physiological Aspects of Chemical Warfare - Report on the Detection of Particles of Cadmium Oxide in Sections of Mouse Lung 1944 - 1944