| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALGERIA | Signature | 26/06/1952 | |
| ALGERIA | Ratification | 19/10/1962 | |
| Antigua | Extension | 26/06/1962 | |
| ANTIGUA AND BARBUDA | Succession | 02/02/1983 | 02/02/1983 |
| Antilles | Extension | 02/06/1964 | |
| Aruba | Extension | 01/01/1986 | 01/01/1986 |
| Aruba | Declaration | 01/01/1986 | |
| AUSTRIA | Signature | 26/06/1952 | |
| AUSTRIA | Ratification | 14/06/1954 | |
| BARBADOS | Signature | 26/06/1952 | |
| Barbados | Extension | 09/02/1959 | |
| BARBADOS | Ratification | 08/05/1967 | |
| BELGIUM | Signature | 26/06/1952 | |
| BELGIUM | Ratification | 20/03/1954 | |
| BELGIUM | Declaration | 20/03/1954 | |
| BELIZE | Succession | 15/12/1983 | 15/12/1983 |
| Bermuda | Extension | 09/02/1959 | |
| BRAZIL | Signature | 26/06/1952 | |
| BRAZIL | Ratification | 25/04/1957 | |
| British Honduras | Extension | 01/08/1961 | |
| British Virgin Islands | Extension | 09/02/1959 | |
| BURUNDI | Signature | 26/06/1952 | |
| BURUNDI | Ratification | 30/07/1971 | |
| CAMEROON | Signature | 26/06/1952 | |
| CAMEROON | Ratification | 25/05/1970 | |
| CAMEROON | Denunciation | 07/08/1973 | |
| CENTRAL AFRICAN REPUBLIC | Signature | 26/06/1952 | |
| CENTRAL AFRICAN REPUBLIC | Ratification | 09/06/1964 | |
| COLOMBIA | Signature | 26/06/1952 | |
| COLOMBIA | Ratification | 04/03/1969 | |
| COMOROS | Succession | 23/10/1978 | 23/10/1978 |
| COMOROS | Declaration | 23/10/1978 | |
| COSTA RICA | Ratification | 25/09/1984 | 25/09/1985 |
| CUBA | Signature | 26/06/1952 | |
| CUBA | Ratification | 07/09/1954 | |
| DJIBOUTI | Succession | 03/08/1978 | 03/08/1978 |
| DJIBOUTI | Declaration | 03/08/1978 | 03/08/1978 |
| ECUADOR | Signature | 26/06/1952 | |
| ECUADOR | Ratification | 03/10/1969 | 03/10/1970 |
| EGYPT | Signature | 26/06/1952 | |
| EGYPT | Ratification | 09/04/1956 | |
| Falkland Islands | Extension | 09/02/1959 | |
| FRANCE | Signature | 26/06/1952 | |
| FRANCE | Ratification | 29/03/1954 | |
| FRANCE | Extension | 27/11/1974 | |
| GABON | Signature | 26/06/1952 | |
| GABON | Ratification | 13/06/1961 | |
| GERMANY FEDERAL REPUBLIC | Signature | 26/06/1952 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 05/01/1955 | |
| GERMANY FEDERAL REPUBLIC | Denunciation | 01/10/1975 | |
| Gibraltar | Extension | 09/02/1959 | |
| GUATEMALA | Signature | 26/06/1952 | |
| GUATEMALA | Ratification | 04/08/1961 | |
| Guernsey | Extension | 08/03/1960 | |
| Hong Kong | Extension | 27/01/1978 | |
| Hong Kong | Declaration | 27/01/1978 | |
| Hong Kong | Declaration | 13/11/1979 | |
| Hong Kong | Declaration | 09/04/1981 | |
| Hong Kong | Declaration | 07/04/1983 | |
| Hong Kong | Declaration | 03/11/1983 | |
| Hong Kong | Declaration | 27/04/1984 | |
| Hong Kong | Declaration | 27/02/1985 | 27/02/1985 |
| Hong Kong | Declaration | 06/03/1992 | |
| HUNGARY | Signature | 26/06/1952 | |
| HUNGARY | Ratification | 08/06/1956 | |
| Isle of Man | Extension | 29/03/1961 | |
| ISRAEL | Signature | 26/06/1952 | |
| ISRAEL | Ratification | 14/07/1953 | |
| ITALY | Signature | 26/06/1952 | |
| ITALY | Ratification | 08/06/1956 | |
| ITALY | Denunciation | 28/07/1981 | |
| Jersey | Extension | 08/03/1960 | |
| Jersey | Declaration | 08/03/1960 | |
| MADAGASCAR | Signature | 26/06/1952 | |
| MADAGASCAR | Ratification | 10/08/1962 | |
| MADAGASCAR | Denunciation | 08/02/1972 | |
| MAURITANIA | Signature | 26/06/1952 | |
| MAURITANIA | Ratification | 08/11/1963 | |
| Mauritius | Extension | 07/06/1967 | |
| Montserrat | Extension | 09/02/1959 | |
| MOROCCO | Signature | 26/06/1952 | |
| MOROCCO | Ratification | 14/10/1960 | |
| NETHERLANDS THE | Signature | 26/06/1952 | |
| NETHERLANDS THE | Ratification | 27/11/1958 | |
| NEW ZEALAND | Signature | 26/06/1952 | |
| NEW ZEALAND | Ratification | 24/07/1953 | |
| NORWAY | Signature | 26/06/1952 | |
| NORWAY | Ratification | 30/09/1954 | |
| NORWAY | Denunciation | 22/06/1973 | |
| PARAGUAY | Signature | 26/06/1952 | |
| PARAGUAY | Ratification | 21/03/1966 | |
| PERU | Signature | 26/06/1952 | |
| PERU | Ratification | 01/02/1960 | |
| POLAND | Signature | 26/06/1952 | |
| POLAND | Ratification | 08/10/1956 | |
| SAINT LUCIA | Ratification | 14/05/1980 | 14/05/1980 |
| SENEGAL | Signature | 26/06/1952 | |
| SENEGAL | Ratification | 22/10/1962 | |
| SIERRA LEONE | Signature | 26/06/1952 | |
| SIERRA LEONE | Ratification | 15/06/1961 | |
| Singapore | Extension | 13/03/1961 | |
| SPAIN | Signature | 26/06/1952 | |
| SPAIN | Ratification | 05/05/1971 | |
| St Christopher, Nevis and Anguilla | Extension | 05/01/1961 | |
| St Helena | Extension | 09/02/1959 | |
| St Lucia | Extension | 11/04/1960 | |
| St Lucia | Declaration | 11/04/1960 | |
| St Vincent | Extension | 11/04/1960 | |
| St Vincent | Declaration | 11/04/1960 | |
| ST VINCENT AND THE GRENADINES | Ratification | 21/10/1998 | 31/05/1995 |
| Surinam | Extension | 02/06/1964 | |
| SURINAME | Signature | 26/06/1952 | |
| SURINAME | Ratification | 15/06/1976 | |
| Swaziland | Extension | 27/04/1966 | |
| SWAZILAND | Succession | 05/06/1981 | 05/06/1982 |
| SWEDEN | Signature | 26/06/1952 | |
| SWEDEN | Ratification | 12/08/1953 | |
| SWEDEN | Denunciation | 07/06/1978 | |
| SYRIA | Signature | 26/06/1952 | |
| SYRIA | Ratification | 26/07/1960 | |
| TANGANYIKA | Signature | 26/06/1952 | |
| Tanganyika | Extension | 09/02/1959 | |
| TANGANYIKA | Ratification | 30/01/1962 | |
| UNITED KINGDOM | Signature | 26/06/1952 | |
| UNITED KINGDOM | Ratification | 25/06/1956 | |
| UNITED KINGDOM | Denunciation | 16/08/1994 | 16/08/1995 |
| UPPER VOLTA | Signature | 26/06/1952 | |
| UPPER VOLTA | Ratification | 30/06/1969 | 30/06/1970 |
| UPPER VOLTA | Denunciation | 12/07/1974 | |
| URUGUAY | Signature | 26/06/1952 | |
| URUGUAY | Ratification | 18/03/1954 | |
| URUGUAY | Denunciation | 02/06/1977 | |
| YUGOSLAVIA | Signature | 26/06/1952 | |
| YUGOSLAVIA | Ratification | 30/04/1955 | |
| YUGOSLAVIA | Denunciation | 12/05/1975 |