| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Ratification | 03/06/1957 | |
| Anguilla | Decision Resvd. | 27/03/1950 | |
| ARGENTINA | Ratification | 26/05/1936 | |
| AUSTRALIA | Ratification | 28/06/1935 | |
| AZERBAIJAN | Ratification | 19/05/1992 | 19/05/1992 |
| BANGLADESH | Ratification | 22/06/1972 | |
| Barbados | Extension | 29/12/1958 | |
| BELARUS | Ratification | 06/11/1956 | |
| BELGIUM | Ratification | 19/07/1926 | |
| BELIZE | Ratification | 15/12/1983 | 15/12/1983 |
| BELIZE | Declaration | 15/12/1983 | |
| Bermuda | Extension | 27/03/1950 | |
| BOSNIA AND HERZEGOVINA | Ratification | 02/06/1993 | 02/06/1993 |
| BRAZIL | Ratification | 08/06/1936 | |
| British Honduras | Extension | 22/08/1966 | |
| British Virgin Islands | Decision Resvd. | 27/03/1950 | |
| Brunei | Decision Resvd. | 27/03/1950 | |
| Brunei | Extension | 11/09/1961 | |
| Brunei | Declaration | 11/09/1961 | |
| BULGARIA | Ratification | 06/03/1925 | |
| BURMA | Ratification | 20/11/1922 | |
| CAMEROON | Ratification | 03/09/1962 | |
| CANADA | Ratification | 31/03/1926 | |
| CEYLON | Ratification | 25/04/1951 | |
| CHILE | Ratification | 18/10/1935 | |
| CHINA | Ratification | 02/12/1936 | |
| COLOMBIA | Ratification | 20/06/1933 | |
| COSTA RICA | Ratification | 23/07/1991 | 23/07/1991 |
| CROATIA | Ratification | 08/10/1991 | 08/10/1991 |
| CUBA | Ratification | 07/07/1928 | |
| CYPRUS | Ratification | 23/09/1960 | |
| DENMARK | Ratification | 23/04/1938 | |
| DENMARK | Declaration | 31/05/1954 | |
| DJIBOUTI | Succession | 03/08/1978 | 03/08/1978 |
| Dominica | Extension | 27/03/1950 | |
| DOMINICA, COMMONWEALTH OF | Ratification | 28/02/1983 | |
| ESTONIA | Ratification | 08/09/1922 | 08/09/1922 |
| Falkland Islands | Decision Resvd. | 27/03/1950 | |
| Fiji | Extension | 27/03/1950 | |
| FINLAND | Ratification | 10/10/1925 | |
| FRANCE | Ratification | 22/03/1928 | |
| French Overseas Departments | Extension | 27/11/1974 | |
| French Overseas Territories | Extension | 27/11/1974 | |
| GERMAN DEMOCRATIC REPUBLIC | Ratification | 01/01/1974 | |
| GERMAN DEMOCRATIC REPUBLIC | Reservation | 01/01/1974 | |
| GERMANY | Ratification | 11/06/1929 | |
| GHANA | Ratification | 20/05/1957 | |
| Gibraltar | Extension | 27/03/1950 | |
| GREECE | Ratification | 28/06/1930 | |
| Greenland | Extension | 31/05/1954 | |
| Grenada | Extension | 27/03/1950 | |
| GRENADA | Succession | 09/07/1979 | |
| GUATEMALA | Ratification | 13/06/1989 | |
| Guernsey | Extension | 08/03/1926 | |
| GUINEA | Ratification | 12/12/1966 | |
| Hong Kong | Extension | 27/03/1950 | |
| HUNGARY | Ratification | 01/03/1928 | |
| INDIA | Ratification | 20/11/1922 | |
| IRAQ | Ratification | 19/04/1966 | |
| IRELAND, REPUBLIC OF | Ratification | 05/07/1930 | |
| Isle of Man | Extension | 08/03/1926 | |
| ITALY | Ratification | 08/09/1924 | |
| JAMAICA | Ratification | 26/12/1962 | |
| JAPAN | Ratification | 07/06/1924 | |
| Jersey | Extension | 08/03/1926 | |
| KENYA | Ratification | 09/02/1971 | |
| KYRGYZSTAN | Succession | 31/03/1992 | 31/03/1992 |
| LATVIA | Ratification | 09/09/1924 | 09/09/1924 |
| LUXEMBOURG | Ratification | 16/04/1928 | |
| MALAYSIA | Ratification | 03/03/1964 | |
| MALTA | Succession | 04/01/1965 | |
| Mauritius | Extension | 27/03/1950 | |
| MAURITIUS | Ratification | 02/12/1969 | |
| MEXICO | Ratification | 09/03/1938 | |
| Montserrat | Extension | 05/07/1962 | |
| NETHERLANDS THE | Ratification | 09/03/1928 | |
| NEW ZEALAND | Ratification | 05/12/1961 | |
| NICARAGUA | Ratification | 12/04/1934 | |
| NIGERIA | Ratification | 17/10/1960 | |
| NORWAY | Ratification | 05/12/1980 | 05/12/1980 |
| PAKISTAN | Ratification | 20/11/1922 | |
| PANAMA | Ratification | 19/06/1970 | |
| Papua New Guinea | Extension | 15/06/1973 | |
| POLAND | Ratification | 21/06/1924 | |
| ROUMANIA | Ratification | 18/08/1923 | |
| SAINT LUCIA | Succession | 14/05/1980 | 14/05/1980 |
| SERB-CROAT-SLOVENE STATE | Ratification | 01/04/1927 | |
| Seychelles | Extension | 27/03/1950 | |
| SEYCHELLES | Succession | 06/02/1978 | 06/02/1978 |
| SIERRA LEONE | Ratification | 13/06/1961 | |
| SINGAPORE | Ratification | 25/10/1965 | |
| SLOVENIA | Ratification | 09/06/1992 | 09/06/1992 |
| Solomon Islands | Extension | 27/03/1950 | |
| SOLOMON ISLANDS | Succession | 06/08/1985 | 06/08/1985 |
| SOMALI DEMOCRATIC REPUBLIC | Ratification | 11/06/1975 | |
| SOMALIA | Ratification | 18/11/1960 | |
| Somaliland | Extension | 28/12/1953 | |
| SOVIET UNION | Ratification | 10/08/1956 | |
| SPAIN | Ratification | 20/06/1924 | |
| St Helena | Extension | 27/03/1950 | |
| St Lucia | Extension | 27/03/1950 | |
| St Vincent | Extension | 27/03/1950 | |
| ST VINCENT AND THE GRENADINES | Ratification | 21/10/1998 | 31/05/1995 |
| SWEDEN | Ratification | 14/07/1925 | |
| SWITZERLAND | Ratification | 21/04/1960 | |
| TAJIKISTAN | Ratification | 26/11/1993 | 26/11/1993 |
| TANGANYIKA AND ZANZIBAR | Ratification | 22/06/1964 | |
| TANZANIA | Ratification | 30/01/1962 | |
| TRINIDAD AND TOBAGO | Ratification | 24/05/1963 | |
| TUNISIA | Ratification | 14/04/1970 | |
| UKRAINE | Ratification | 14/09/1956 | |
| UNITED KINGDOM | Ratification | 08/03/1926 | |
| URUGUAY | Ratification | 06/06/1933 | |
| YEMEN, PEOPLES'S DEMOCRATIC REPUBLIC OF | Ratification | 14/04/1969 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Ratification | 24/11/2000 | 24/11/2000 |