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
21

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 244/2/2 [Demolitions - Schemes:] Demolition Plans: Brisbane Fortress Area, Belt "B" 1939 - 1945
A1209 1958/5994 PART 3 [Modified title: Exchange of intelligence material] - Weekly intelligence summaries 1958 - 1958
A1838 TS917/2 United Nations Anglo Argentine Dispute - Falkland Islands 1946 - 1948
A6119 248 BREZNIAK, Lhyam (VOLUME 2) 1955 - 1955
A7359 BOX 10/13 Report by [portion of title exempt] on the recommendation of a security service of the Commonwealth of Australia after the termination of hostilities (together with comment on the present organisation of the Commonwealth Security Service) 22.9.44 1944 - 1944
A6122 1092 Communist Party of Australia - New South Wales - illegal apparatus 1949 - 1956
A6122 773 Communist Party of Australia. NSW Ross Street Technical College Branch 1949 - 1949
A1838 100/12/9 [modified title, original item title partially exempt] 1953 - 1976
A6122 827 Communist Party of Australia - Victoria - BALWYN branch 1947 - 1956
A12933 122 Cabinet Paper No 122 : [title exempt] - File No LC1106 01 Aug 1977 - 01 Aug 1977
A1838 TS899/6/6/1 Commonwealth Prime Ministers Conference 1960 - Minutes and Proceedings [290pp] 1960 - 1960
A816 14/301/530 The Defence Department's Programme 1952-53 1952 - 1953
A2031 125/1955 Exchange of information for SEAMIL purposes 1955 - 1955
A1838 TS490/6/1 China - Personalities - General 1955 - 1955
A6119 1808 GILLEN, James Patrick - Supp 1 1956 - 1956
AWM54 244/2/41 [Demolitions - Schemes:] Demolition Plan: Road bridge - Richmond River at Casino, Tween River at Byangum, Richmond River at Coraki, Tweed River at Murwillumbah and Barney's Point 1939 - 1945
A7936 B/5/10 Estimates 1957-1958 1957 - 1957
A1945 249/12/14 SEATO - Committee of Security Experts [4cms] 1961 - 1961
A1838 100/12/1 Schedules - Foreign Affairs [modified title, original title partially exempt] 1956 - 1957
A5799 234/1952 Five Power Military Conference on South East Asia - UK papers on 'possible deterents to further Chinese aggression in South East Asia' and 'possible operations against Hainan' 1952 - 1952