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
18

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 179/5/10 PART 4 [Chemical Warfare - Trials:] Headquarters, San Jose, Project Division. Reports by technical staff, San Jose Project 1945-1946, Bi Weekly progress reports 1945, San Jose Project reports, Field Tests, 1944 [Part 4 of 13] 1944 - 1946
A9108 ROLL 16/23 Democratic Republic of Vietnam - Organisations abroad 1951 - 1952
A6122 634 Communist Party of Australia - Queensland - City Section 1949 - 1949
A12389 A101 ASIO document: Review of and Recommendations for Restructuring the Surveillance Capacity of ASIO 1976 - 1976
A6122 1058 Communist Party of Australia - New South Wales, Taxi drivers' branch 1949 - 1958
A1209 1969/9036 PART 26 Malaysia/Singapore defence policy and administration arrangements 1969 - 1969
A1533 1954/1099 Office seals 1954 - 1961
A1838 154/11/87 PART 1 Tanganyika - Relations with China 1961 - 1965
A1209 1957/5065 Naval study of the SEATO area - including the control and protection of shipping [97 pp] 1957 - 1958
A1838 3027/2/1 PART 13 Malaysia - Political - General 1963 - 1963
A9954 SE/10/D2 Agenda item 2b. The Communist insurgent threat to the Treaty area. Collated paper presented by the United Kingdom 1959 - 1959
A1838 3032/2/9 PART 8 Sarawak - Internal Security 1971 - 1972
AWM54 244/2/19 [Demolitions - Schemes:] Demolition Schedule Queensland: Road Block Mines, 2 Corps Engineer Officers 1939 - 1945
A1838 3027/2/9/2 PART 2 Malaysia - Internal security 1962 - 1966
A1209 1958/5994 PART 4 [Modified title: Exchange of intelligence material] - Weekly intelligence summaries 1958 - 1958
AWM54 244/2/29 PART 1 [Demolitions - Schemes:] Plans of bridges in the event of bridge demolitions, north and south coast of NSW and northern towns of NSW [Part 1 of 2] 1939 - 1945
A1209 1959/1040 SEATO 5th intelligence committee meeting Bangkok Nov 1959 Australian representation 1959 - 1959
A1209 1959/154 Anti-communist resistance potential in the Sino-Soviet Bloc 1959 - 1959
A1533 1953/350 Police cooperation - Great Britain [2 pages] 1953 - 1953
AWM54 179/5/1 PART 4 [Chemical Warfare - Trials:] Reports from the Chemical Defence Board, Research and Experimental Section, Innisfail, Queensland [Part 4 of 10] 1944 - 1944