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
20

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 179/5/8 PART 7 [Chemical Warfare - Trials:] Munitions Supply Laboratories. Abstract reports indexed in records of Chemical Defence Board [Part 7 of 23] 1944 - 1944
A6122 841 Communist Party of Australia - South Australia. West Adelaide Branch 1949 - 1957
A1209 1977/881 PART 3 South African Apartheid Policy - General - 1973 1977 - 1978
A816 41/301/195 Exchange of staff between Joint Intelligence Bureau (Melbourne) and Joint Intelligence Bureau (London) - personal letter from Sir Harold Parker 1953 - 1958
A1838 3103/11/109 PART 1 Japan - Relations with Singapore 1963 - 1973
A1209 1959/547 PART 3 Australian Intelligence Survey, JIB (A) Report No 6/12, Issued Dec. 1963, Copy No. 5 1959 - 1959
A1209 1975/2257 East Timor - Activities of Australian journalists 01 Sep 1975 - 08 Mar 1976
A4398 25/301 PART 1 L14 subject registration booklet for the 25/301/- section of Defence classified file series, A816: intelligence (file numbers 5 - 616) - Book 1 1938 - 1956
A816 43/302/76 Cryptographic Material for ASIO 1951 - 1952
AWM54 179/1/23 PART 1 [Chemical Warfare - General:] 42nd Chemical Laboratory Company: Technical Reports [Part 1 of 9] 1940 - 1945
K279 1982/847 Defence (Army) - unit magazine at Swanbourne - siting board [Department of Works/Construction] 1982 - 1982
A1533 1956/187 Alleged smuggling of goods and forged currency - Sydney. THOMPSON, Lachlan Joseph and others 1956 - 1959
A816 11/301/881 Relationship of Quintel Organisation to Five Power Planners Organisation 1953 - 1954
A1838 1957/5/11 PART 2 ASIO - [remainder of file title withheld] 1970 - 1981
A816 25/301/557 Five Power Staff Planners' Conference, September 1953. Intelligence studies 1953 - 1954
A6122 1072 Communist Party of Australia - New South Wales, Menindee Branch 1949 - 1956
A1838 3027/10/1 PART 7 Malaysia - Political Relations with Australia 1968 - 1969
A12389 A34 ASIO document: BfV The West German Security Intelligence Service: Service Regulations 1975 - 1975
A367 C108408 BUDDLE, Thomas Gordon, THOMAS, John Henry 1953 - 1953
A12389 A8 PART 3 ASIO Organization, Functions and Responsibilities - Lecture Notes -document 5A 1974 - 1974