| Country | Action | Action Date | Effective Date |
|---|
| Antigua | Extension | 12/11/1965 | |
| Antigua | Reservation | 12/11/1965 | |
| Antilles | Extension | 25/06/1971 | |
| Antilles | Notification | 01/01/1986 | |
| ARGENTINA | Accession | 19/04/1961 | |
| ARGENTINA | Reservation | 19/04/1961 | |
| Aruba | Extension | 01/01/1986 | |
| Bahamas | Extension | 12/11/1965 | |
| Bahamas | Reservation | 12/11/1965 | |
| BELGIUM | Signature | 10/05/1952 | |
| BELGIUM | Ratification | 10/04/1961 | |
| Bermuda | Extension | 30/05/1963 | |
| Bermuda | Reservation | 30/05/1963 | |
| BRAZIL | Signature | 10/05/1952 | |
| British Guiana | Extension | 29/03/1963 | |
| British Guiana | Reservation | 29/03/1963 | |
| British Honduras | Extension | 21/03/1966 | |
| British Honduras | Reservation | 21/03/1966 | |
| British Virgin Islands | Extension | 29/05/1963 | |
| British Virgin Islands | Reservation | 29/05/1963 | |
| BURMA | Accession | 08/07/1953 | |
| CAMBODIA | Accession | 12/11/1956 | |
| CAMBODIA | Reservation | 12/11/1956 | |
| Cayman Islands | Extension | 12/11/1965 | |
| Cayman Islands | Reservation | 12/11/1965 | |
| CHINA | Declaration | 06/12/1999 | |
| CHINA | Reservation | 06/12/1999 | |
| COSTA RICA | Accession | 13/07/1955 | |
| COSTA RICA | Reservation | 13/07/1955 | |
| CROATIA | Succession | 30/07/1992 | 08/10/1991 |
| CYPRUS | Accession | 17/03/1994 | 17/09/1994 |
| DENMARK | Signature | 10/05/1952 | |
| Dominica | Extension | 12/11/1965 | |
| Dominica | Reservation | 12/11/1965 | |
| EGYPT | Signature | 06/01/1955 | |
| EGYPT | Reservation | 06/01/1955 | |
| EGYPT | Ratification | 24/08/1955 | |
| EGYPT | Reservation | 24/08/1955 | |
| Falkland Island Dependencies | Extension | 17/10/1969 | 17/04/1970 |
| Falkland Island Dependencies | Reservation | 17/10/1969 | |
| Fiji | Extension | 29/03/1963 | |
| Fiji | Reservation | 29/03/1963 | |
| FIJI | Succession | 22/08/1972 | 10/10/1970 |
| FIJI | Communication | 22/08/1972 | |
| FIJI | Reservation | 22/08/1972 | 10/10/1972 |
| FIJI | Reservation | 22/08/1972 | 10/10/1970 |
| FRANCE | Signature | 10/05/1952 | |
| FRANCE | Reservation | 10/05/1952 | |
| FRANCE | Ratification | 20/05/1955 | |
| French Cameroons | Extension | 23/04/1958 | |
| French Togoland | Extension | 23/04/1958 | |
| GERMANY FEDERAL REPUBLIC | Signature | 10/05/1952 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 06/10/1972 | 06/04/1973 |
| GERMANY FEDERAL REPUBLIC | Reservation | 06/10/1972 | |
| Gibraltar | Extension | 29/03/1963 | |
| Gibraltar | Reservation | 29/03/1963 | |
| Gilbert And Ellice Islands | Extension | 21/03/1966 | |
| Gilbert And Ellice Islands | Reservation | 21/03/1966 | |
| GREECE | Signature | 10/05/1952 | |
| GREECE | Ratification | 15/03/1965 | |
| Grenada | Extension | 12/11/1965 | |
| Grenada | Reservation | 12/11/1965 | |
| Guernsey | Extension | 06/06/1967 | 06/06/1967 |
| Guernsey | Reservation | 06/06/1967 | |
| HAITI | Accession | 19/09/1954 | |
| HOLY SEE | Signature | 04/02/1954 | |
| HOLY SEE | Ratification | 10/08/1956 | |
| Hong Kong | Extension | 29/03/1963 | |
| Hong Kong | Reservation | 29/03/1963 | |
| HONG KONG SAR | Application | 04/06/1997 | 01/07/1997 |
| HONG KONG SAR | Reservation | 04/06/1997 | 01/07/1997 |
| ITALY | Signature | 10/05/1952 | |
| ITALY | Ratification | 09/11/1979 | 09/05/1980 |
| ITALY | Reservation | 09/11/1979 | |
| Land Berlin | Extension | 06/10/1972 | 06/04/1973 |
| Land Berlin | Reservation | 06/10/1972 | |
| LEBANON | Signature | 25/05/1954 | |
| LEBANON | Ratification | 19/07/1975 | 23/01/1976 |
| LUXEMBOURG | Accession | 18/02/1991 | 18/08/1991 |
| Macao | Extension | 23/03/1999 | 23/09/1999 |
| MALAGASY REPUBLIC | Succession | 13/07/1965 | |
| Mauritius | Extension | 29/03/1963 | |
| Mauritius | Reservation | 29/03/1963 | |
| MONACO | Signature | 10/05/1952 | |
| Montserrat | Extension | 12/11/1965 | |
| Montserrat | Reservation | 12/11/1965 | |
| MOROCCO | Accession | 11/07/1990 | 11/01/1991 |
| NETHERLANDS THE | Signature | 08/12/1970 | |
| NETHERLANDS THE | Reservation | 08/12/1970 | |
| NETHERLANDS THE | Ratification | 25/06/1971 | |
| NETHERLANDS THE | Reservation | 25/06/1971 | |
| NICARAGUA | Signature | 10/05/1952 | |
| NIGERIA | Accession | 07/11/1963 | |
| NIGERIA | Reservation | 07/11/1963 | |
| North Borneo | Extension | 29/03/1963 | |
| North Borneo | Reservation | 29/03/1963 | |
| PARAGUAY | Accession | 22/11/1967 | |
| PORTUGAL | Signature | 16/10/1956 | |
| PORTUGAL | Reservation | 16/10/1956 | |
| PORTUGAL | Ratification | 04/05/1957 | |
| PORTUGAL | Communication | 17/11/1999 | |
| ROMANIA | Accession | 28/11/1995 | 28/05/1996 |
| SAINT LUCIA | Declaration | 09/03/1990 | |
| Sarawak | Extension | 28/08/1962 | |
| Sarawak | Reservation | 28/08/1962 | |
| Seychelles | Extension | 29/03/1963 | |
| Seychelles | Reservation | 29/03/1963 | |
| SLOVENIA | Succession | 13/10/1993 | 25/06/1991 |
| Solomon Islands | Extension | 21/03/1966 | |
| Solomon Islands | Reservation | 21/03/1966 | |
| SOLOMON ISLANDS | Succession | 17/09/1981 | 07/07/1978 |
| SPAIN | Signature | 10/05/1952 | |
| SPAIN | Reservation | 10/05/1952 | |
| SPAIN | Ratification | 08/12/1953 | |
| St Christopher, Nevis and Anguilla | Extension | 12/11/1965 | |
| St Christopher, Nevis and Anguilla | Reservation | 12/11/1965 | |
| St Helena | Extension | 12/11/1965 | |
| St Helena | Reservation | 12/11/1965 | |
| St Lucia | Extension | 12/11/1965 | |
| St Lucia | Reservation | 12/11/1965 | |
| St Lucia | Declaration | 09/03/1990 | |
| St Vincent | Extension | 12/11/1965 | |
| St Vincent | Reservation | 12/11/1965 | |
| ST VINCENT AND THE GRENADINES | Succession | 15/02/2002 | 28/10/1979 |
| Surinam | Extension | 25/06/1971 | |
| SWITZERLAND | Accession | 28/05/1954 | |
| SYRIA | Accession | 10/07/1972 | 10/01/1973 |
| TONGA | Accession | 13/06/1978 | 13/12/1978 |
| TONGA | Reservation | 13/06/1978 | |
| Turks And Caicos Islands | Extension | 21/03/1966 | |
| Turks And Caicos Islands | Reservation | 21/03/1966 | |
| UNITED KINGDOM | Reservation | 10/05/1952 | |
| UNITED KINGDOM | Signature | 10/05/1952 | |
| UNITED KINGDOM | Ratification | 18/03/1959 | |
| UNITED KINGDOM | Reservation | 18/03/1959 | |
| VIETNAM | Accession | 26/11/1955 | |
| VIETNAM | Reservation | 26/11/1955 | |
| YUGOSLAVIA | Signature | 10/05/1952 | |
| YUGOSLAVIA | Ratification | 21/04/1956 | |
| YUGOSLAVIA | Reservation | 21/04/1956 | |
| ZAIRE | Accession | 17/07/1967 | |