RatificationS=Signature without reservation or requirement of ratification R=Ratification, Acceptance,
Approval or Notification A=Accession Su=Succession NK=Not Known
Entry into force
Renunciation
Termination
Albania
20-04-1921
08-10-1921 (R)
08-10-1921
Antigua and Barbuda
25-10-1988 (Su)
01-11-1981
Australia
31-10-1922 (A)
31-10-1922
Austria
20-04-1921
10-07-1924 (R)
10-07-1924
Belgium
20-04-1921
16-05-1927 (R)
16-05-1927
Bolivia
20-04-1921
Bulgaria
20-04-1921
11-07-1922 (R)
11-07-1922
Canada
31-10-1922 (A)
31-10-1922
Chile
20-04-1921
19-03-1928 (R)
19-03-1928
China
20-04-1921
Croatia
03-08-1992 (Su)
08-10-1991
Czech Republic
09-02-1996 (Su)
01-01-1993
Czechoslovakia (<01-01-1993)
20-04-1921
08-09-1924 (R)
08-09-1924
Denmark
20-04-1921
13-11-1922 (R)
13-11-1922
Estonia
20-04-1921 (S)
20-04-1921
Eswatini
16-10-1970 (A)
16-10-1970
Fiji
15-03-1972 (Su)
10-10-1970
Finland
22-09-1922 (A)
22-09-1922
France
20-04-1921 (S)
20-04-1921
Germany
10-11-1931 (A)
10-11-1931
Greece
20-04-1921
03-01-1928 (R)
03-01-1928
Guatemala
20-04-1921
Hungary
18-05-1928 (A)
18-05-1928
India
20-04-1921
09-10-1922 (R)
09-10-1922
Iran
20-04-1921
Iraq
17-04-1935 (A)
17-04-1935
Italy
20-04-1921 (S)
20-04-1921
Japan
20-04-1921
20-02-1924 (R)
20-02-1924
Latvia
20-04-1921
12-02-1924 (R)
12-02-1924
Lesotho
23-10-1973 (Su)
04-10-1966
Lithuania
20-04-1921
Malawi
11-06-1969 (Su)
01-01-1964
Malta
21-09-1966 (Su)
21-09-1964
Mauritius
18-07-1969 (Su)
12-03-1968
Mexico
17-10-1935 (A)
17-10-1935
Mongolia
15-10-1976 (A)
15-10-1976
Netherlands, the Kingdom of the
28-11-1921 (S)
28-11-1921
New Zealand
20-04-1921
09-10-1922 (R)
09-10-1922
Norway
20-04-1921
04-09-1923 (R)
04-09-1923
Panama
20-04-1921
Peru
15-09-1924 (A)
Poland
20-04-1921
20-12-1924 (R)
20-12-1924
Portugal
20-04-1921
Romania
22-02-1923 (A)
22-02-1923
Russian Federation
16-05-1935 (A)
16-05-1935
Rwanda
10-02-1965 (Su)
01-07-1962
Saint Vincent and the Grenadines
05-09-2001 (Su)
27-10-1979
Slovakia
28-05-1993 (Su)
01-01-1993
Solomon Islands
03-09-1981 (Su)
07-07-1978
South Africa
31-10-1922 (A)
31-10-1922
Spain
20-04-1921
01-07-1929 (R)
01-07-1929
Sweden
20-04-1921
19-01-1925 (R)
19-01-1925
Switzerland
20-04-1921 (S)
20-04-1921
Thailand
29-11-1922 (A)
29-11-1922
Türkiye
27-06-1933 (A)
27-06-1933
United Kingdom
20-04-1921
09-10-1922 (R)
09-10-1922
Uruguay
20-04-1921
Yugoslavia (< 25-06-1991)
20-04-1921
07-05-1930 (R)
07-05-1930
Zimbabwe
01-12-1998 (Su)
18-04-1980
Extensions
China
Extended to
Entry into force
Termination
Hong Kong SAR
01-07-1997
United Kingdom
Extended to
Entry into force
Termination
Aden (< 30-11-1967)
09-10-1922
30-11-1967
Akrotiri and Dhekelia (Sovereign Base Areas in Cyprus)