33(1)(a)

contains information or matter the disclosure of which under this Act could reasonably be expected to cause damage to the security, defence or international relations of the Commonwealth
— Section 33(1)(a) of the Archives Act 1983

1010

closed files

cite this as a reason you're not allowed to see them
60

years

is the average age of closed files that cite this reason, based on the date of their earliest content
108

series

contain closed files that cite this reason
19

years

is the average age of decisions to closed files citing this reason

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

Series Control Symbol Title Contents dates
AWM54 179/1/20 PART 7 [Chemical Warfare - General:] Australian Military Forces: Technical Notes and Staff Notes - Chemical Warfare, Jun 1944 [Part 7 of 19] 1944 - 1944
A6119 665 George Ernest Archer RUSSELL 1951 - 1960
A1838 563/10/10/10 PART 1 SEATO - trends and highlights in Communist propaganda 1956 - 1957
A6980 S250846 Security Screening Procedure - Netherlands 1952 - 1992
A1209 1960/17 Main trends in Soviet capabilities and policies 1958-1963 [part of title exempt] 1958 - 1958
A14039 8056 Cabinet Memorandum 8056 - Title exempt - Decision 15324/SEC 25 Jun 1991 - 02 Jul 1991
AWM54 179/3/3 PART 5 [Chemical Warfare - Types of Agents:] Canada, Sub-Committee on Physiological Aspects of Chemical Warfare, Dec 1943 - Report on Treatment of Phosgene Poisoning 1943 - 1943
A6119 3242 FALCONER, James Albert - Misc Papers 1970 - 1970
A12909 2825 Submission No 2825 : [Title exempt] 06 Dec 1978 - 06 Dec 1978
A6122 1128 Communist Party of Australia. Wharf Branch Victoria 1949 - 1956
A1838 100/4/7 Named country [imposed title, original title wholly exempt] 1956 - 1956
A6122 870 CPA [Communist Party of Australia] - (Western Australia) - Leederville Branch 1949 - 1956
A1838 100/12/4 SIFE [Security Intelligence Far East] Summaries [Far East] [Communist activities in Asia] 1952 - 1959
A6122 2637 Operation Adjutant Volume 5 part 1 - General court martial proceedings, SAC Michael Julien Brown 17 December 1958 1958 - 1958
A6122 1223 CPA [Communist Party of Australia] NSW - Austral Bronze branch 1949 - 1961
A432 1969/3072 ATTACHMENT 2 W.G. Burchett 1953 - 1954
A7452 A145 Intelligence and security services functions 1975 1976 - 1989
A1838 3034/7/7 PART 1 Indonesia - Foreign aid to Indonesia 1951 - 1965
A4624 NN HMAS Leeuwin Tenders - Quarter ending 31/3/41 1941 - 1941
A5799 4/1961 Theatre estimate to be used in the development of MPO plan 6/61 [and supplement no. 1] 1961 - 1961