| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Ratification | 03/06/1957 | |
| ALGERIA | Ratification | 19/10/1962 | |
| ALGERIA | Denunciation | 30/04/1984 | |
| Antigua | Extension | 27/03/1950 | |
| Antigua | Declaration | 27/03/1950 | |
| Antilles | Extension | 05/08/1957 | |
| ARGENTINA | Ratification | 17/02/1955 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| Aruba | Declaration | 01/01/1986 | |
| AUSTRALIA | Ratification | 11/06/1992 | |
| Bahamas | Extension | 27/03/1950 | |
| Bahamas | Declaration | 27/03/1950 | |
| BELGIUM | Ratification | 11/04/1938 | |
| BELGIUM | Declaration | 11/04/1938 | |
| Belize | Extension | 03/05/1977 | |
| BELIZE | Succession | 15/12/1983 | |
| Bermuda | Extension | 04/10/1967 | |
| Bermuda | Declaration | 04/10/1967 | |
| BRAZIL | Ratification | 12/10/1938 | |
| British Honduras | Extension | 27/03/1950 | |
| British Honduras | Declaration | 27/03/1950 | |
| British Virgin Islands | Extension | 27/03/1950 | |
| British Virgin Islands | Declaration | 27/03/1950 | |
| Brunei | Extension | 01/06/1960 | |
| Brunei | Declaration | 01/06/1960 | |
| BULGARIA | Ratification | 29/12/1949 | |
| BULGARIA | Denunciation | 23/04/1980 | 23/04/1981 |
| BYELORUSSIA S S R | Ratification | 06/11/1956 | |
| CANADA | Ratification | 10/09/1951 | |
| CEYLON | Ratification | 18/05/1959 | |
| CUBA | Ratification | 20/07/1953 | |
| CYPRUS | Ratification | 10/01/1995 | |
| DENMARK | Ratification | 04/06/1955 | |
| DJIBOUTI | Succession | 03/08/1978 | |
| Dominica | Extension | 27/03/1950 | |
| Dominica | Declaration | 27/03/1950 | |
| Falkland Islands | Extension | 27/03/1950 | |
| Falkland Islands | Declaration | 27/03/1950 | |
| Falkland Islands | Declaration | 27/01/1978 | 27/01/1978 |
| Fiji | Extension | 27/03/1950 | |
| Fiji | Declaration | 27/03/1950 | |
| FIJI | Ratification | 19/04/1974 | |
| FRANCE | Ratification | 09/12/1948 | |
| French Overseas Territories | Extension | 27/11/1974 | |
| GHANA | Ratification | 20/05/1957 | |
| Gibraltar | Extension | 29/12/1958 | |
| Gibraltar | Declaration | 29/12/1958 | |
| Gilbert Islands | Extension | 27/03/1950 | |
| Gilbert Islands | Declaration | 27/03/1950 | |
| Gilbert Islands | Declaration | 15/12/1978 | 15/12/1978 |
| GREECE | Ratification | 09/10/1963 | |
| Grenada | Extension | 27/03/1950 | |
| Grenada | Declaration | 27/03/1950 | |
| GRENADA | Succession | 09/07/1979 | 09/07/1979 |
| GUATEMALA | Ratification | 30/10/1961 | 30/12/1962 |
| Hong Kong | Extension | 27/03/1950 | |
| Hong Kong | Declaration | 17/10/1979 | 17/10/1979 |
| ICELAND | Ratification | 21/08/1956 | |
| ICELAND | Denunciation | 06/12/1999 | 06/12/2000 |
| IRAQ | Ratification | 30/12/1939 | |
| IRAQ | Denunciation | 13/02/1985 | 13/02/1988 |
| ITALY | Ratification | 22/10/1952 | |
| ITALY | Denunciation | 28/07/1981 | |
| JAMAICA | Succession | 26/12/1962 | |
| JAPAN | Ratification | 22/08/1955 | |
| JAPAN | Denunciation | 05/06/2000 | 05/06/2001 |
| KENYA | Succession | 13/01/1964 | |
| LEBANON | Ratification | 06/12/1993 | 06/12/1994 |
| LIBERIA | Ratification | 09/05/1960 | |
| MAURITANIA | Ratification | 08/11/1963 | |
| Mauritius | Extension | 27/03/1950 | |
| Mauritius | Declaration | 27/03/1950 | |
| MAURITIUS | Ratification | 02/12/1969 | |
| MEXICO | Ratification | 18/07/1952 | |
| Montserrat | Extension | 27/03/1950 | |
| Montserrat | Declaration | 27/03/1950 | |
| NETHERLANDS THE | Ratification | 08/07/1947 | |
| NEW ZEALAND | Ratification | 10/10/1946 | |
| NIGERIA | Succession | 16/06/1961 | |
| NORWAY | Ratification | 07/07/1937 | |
| NORWAY | Denunciation | 08/07/1980 | 08/07/1981 |
| PANAMA | Ratification | 19/06/1970 | |
| Papua New Guinea | Extension | 15/06/1973 | |
| PERU | Ratification | 04/04/1962 | |
| Seychelles | Extension | 27/03/1950 | |
| Seychelles | Declaration | 27/03/1950 | |
| SEYCHELLES | Succession | 06/02/1978 | 06/02/1978 |
| SEYCHELLES | Denunciation | 07/03/2000 | 07/03/2001 |
| SIERRA LEONE | Ratification | 13/06/1961 | |
| Solomon Islands Protectorate | Extension | 27/03/1950 | |
| Solomon Islands Protectorate | Declaration | 27/03/1950 | |
| SOVIET UNION | Ratification | 10/08/1956 | |
| SPAIN | Ratification | 05/05/1971 | |
| St Helena | Extension | 27/03/1950 | |
| St Helena | Declaration | 27/03/1950 | |
| St Kitts Nevis Anguilla | Extension | 27/03/1950 | |
| St Kitts Nevis Anguilla | Declaration | 27/03/1950 | |
| St Lucia | Extension | 27/03/1950 | |
| St Lucia | Declaration | 27/03/1950 | |
| St Vincent | Extension | 27/03/1950 | |
| St Vincent | Declaration | 27/03/1950 | |
| SWEDEN | Ratification | 06/01/1939 | |
| SWITZERLAND | Ratification | 21/04/1960 | |
| TAIWAN | Ratification | 10/12/1964 | |
| TUNISIA | Ratification | 14/04/1970 | |
| TURKEY | Ratification | 29/09/1959 | |
| UKRAINE | Ratification | 14/09/1956 | |
| UNITED KINGDOM | | | |
| UNITED STATES OF AMERICA | Ratification | 29/10/1938 | |
| URUGUAY | Ratification | 18/03/1954 | |
| YEMEN, PEOPLES'S DEMOCRATIC REPUBLIC OF | Ratification | 14/04/1969 | |
| YUGOSLAVIA | Ratification | 05/05/1958 | |
| YUGOSLAVIA | Denunciation | 06/12/1983 | 06/12/1984 |
| ZANZIBAR | Ratification | 22/06/1964 | |