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Signatories to the Antarctic Treaty

The Antarctic Treaty was signed in Washington on 1 December 1959 by 12 states, and entered into force for those states on 23 June 1961. Below are listed in chronological order the dates of ratification of the Treaty by the original signatories, the dates of accession or succession by other states, and the dates upon which acceding states became Consultative Parties.

OS = Original Signatory
CP = Consultative party
AS = Acceding State
State Date Status Date when Acceding State became Consultative Party
1 United Kingdom 31 May 1960 OS/CP
2 South Africa 21 June 1960 OS/CP
3 Belgium 26 July 1960 OS/CP
4 Japan 4 August 1960 OS/CP
5 United States of America 18 August 1960 OS/CP
6 Norway 24 August 1960 OS/CP
7 France 16 September 1960 OS/CP
8 New Zealand 1 November 1960 OS/CP
9

Russia 1

 2 November 1960 OS/CP
10 Poland 8 June 1961 AS/CP 29 July 1977
11 Argentina 23 June 1961 OS/CP
12 Australia 23 June 1961 OS/CP
13 Chile 23 June 1961 OS/CP
14

Czech Republic 2

 14 June 1962 AS
15

Slovak Republic 2

 14 June 1952 AS
16 Denmark 20 May 1965 AS
17 Netherlands 30 March 1967 AS/CP 19 November 1990
18 Romania 15 September 1971 AS

German Democratic Republic 3

 19 November 1974 AS/CP 5 October 1987
19 Brazil 16 May 1975 AS/CP 12 September 1983
20 Bulgaria 11 September 1978 AS/CP 25 May 1998
21 Germany, Federal Republic of 5 February 1979 AS/CP 3 March 1981
22 Uruguay 11 January 1980 AS/CP 7 October 1985
23

Papua New Guinea 4

 16 March 1981 AS
24 Italy 18 March 1981 AS/CP 5 October 1987
25 Peru 10 April 1981 AS/CP 9 October 1989
26 Spain 31 March 1982 AS/CP 21 September 1988
27 China, People's Republic of 8 June 1983 AS/CP 7 October 1985
28 India 19 August 1983 AS/CP 12 September 1983
29 Hungary 27 January 1984 AS
30 Sweden 24 April 1984 AS/CP 21 September 1988
31 Finland 15 May 1984 AS/CP 9 October 1989
32 Cuba 16 August 1984 AS
33 Korea, Republic of 28 November 1986 AS/CP 9 October 1989
34 Greece 8 January 1987 AS
35 Korea, Democratic People's Republic of 21 January 1987 AS
36 Austria 25 August 1987 AS
37 Ecuador 15 September 1987 AS/CP 19 November 1990
38 Canada 4 May 1988 AS
39 Colombia 31 January 1989 AS
40 Switzerland 15 November 1990 AS
41 Guatemala 31 July 1991 AS
42 Ukraine 28 October 1992 AS/CP 17 June 2005
43 Turkey 25 January 1996 AS
44 Venezuela 24 March 1999 AS
45 Estonia 17 May 2001 AS

Notes

1 Known as the Soviet Union until December 1990.
2 Succeeded to the Treaty as part of Czechoslovakia which separated into two republics on 1 January 1993.
3 Became united with Federal Republic of Germany on 3 October 1990 (now known as Germany).
4 Succeeded to the Treaty after independence from Australia.