| Country | Action | Action Date | Effective Date |
|---|
| ALGERIA | Accession | 18/08/1964 | 18/02/1965 |
| Antigua | Extension | 12/05/1965 | 12/11/1965 |
| Antigua | Reservation | 12/11/1965 | |
| Antilles | Extension | 20/01/1983 | 20/07/1983 |
| Antilles | Notification | 01/01/1986 | |
| Aruba | Extension | 01/01/1986 | |
| Bahamas | Extension | 12/05/1965 | 12/11/1965 |
| Bahamas | Reservation | 12/11/1965 | |
| BELGIUM | Signature | 10/05/1952 | |
| BELGIUM | Ratification | 10/04/1961 | 10/10/1961 |
| Belize | Extension | 21/09/1965 | 21/03/1966 |
| BENIN | Accession | 23/04/1958 | 23/10/1958 |
| Bermuda | Extension | 30/05/1963 | 30/11/1963 |
| 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 | 21/03/1966 |
| British Honduras | Reservation | 21/03/1966 | |
| British Virgin Islands | Extension | 29/05/1963 | 29/11/1963 |
| British Virgin Islands | Reservation | 29/05/1963 | |
| BURKINA FASO | Accession | 23/04/1958 | 23/10/1958 |
| CAMBODIA | Accession | 12/11/1956 | 12/05/1957 |
| CAMBODIA | Reservation | 12/11/1956 | |
| CAMEROON | Accession | 23/04/1958 | 23/10/1958 |
| Cayman Islands | Extension | 12/11/1965 | 12/11/1965 |
| Cayman Islands | Reservation | 12/11/1965 | |
| CENTRAL AFRICAN REPUBLIC | Accession | 23/04/1958 | 23/10/1958 |
| CHAD | Accession | 23/04/1958 | 23/10/1958 |
| CONGO, REPUBLIC OF | Accession | 23/04/1958 | 23/10/1958 |
| COSTA RICA | Accession | 13/07/1955 | 24/02/1956 |
| COSTA RICA | Reservation | 13/07/1955 | |
| COTE D'IVOIRE | Accession | 23/04/1958 | 23/10/1958 |
| CROATIA | Succession | 30/07/1992 | 08/10/1991 |
| CUBA | Accession | 21/11/1983 | 21/05/1984 |
| CUBA | Reservation | 21/11/1983 | 01/01/1900 |
| CUBA | Declaration | 21/11/1983 | |
| DENMARK | Signature | 30/03/1989 | |
| DENMARK | Ratification | 02/05/1989 | 02/11/1989 |
| DENMARK | Declaration | 07/08/1989 | |
| DENMARK | Notification | 04/10/1989 | |
| DJIBOUTI | Accession | 23/04/1958 | 23/10/1958 |
| Dominica | Extension | 12/05/1965 | 12/11/1965 |
| Dominica | Reservation | 12/11/1965 | |
| EGYPT | Signature | 06/01/1955 | |
| EGYPT | Reservation | 06/01/1955 | |
| EGYPT | Ratification | 24/08/1955 | 24/02/1956 |
| 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 | 10/10/1970 |
| FINLAND | Signature | 21/12/1995 | |
| FINLAND | Ratification | 21/12/1995 | 21/06/1996 |
| FRANCE | Signature | 10/05/1952 | |
| FRANCE | Ratification | 25/05/1957 | 25/11/1957 |
| French Cameroons | Extension | 23/04/1958 | |
| French Togoland | Extension | 23/04/1958 | |
| GABON | Accession | 23/04/1958 | 23/10/1958 |
| 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 | 29/09/1963 |
| Gibraltar | Reservation | 29/03/1963 | |
| Gilbert And Ellice Islands | Extension | 21/03/1966 | 21/03/1966 |
| Gilbert And Ellice Islands | Reservation | 21/03/1966 | |
| GREECE | Signature | 10/05/1952 | |
| GREECE | Ratification | 27/02/1967 | 27/08/1967 |
| Grenada | Extension | 12/05/1965 | 12/11/1965 |
| Grenada | Reservation | 12/11/1965 | |
| Guernsey | Extension | 08/12/1966 | 08/06/1967 |
| Guernsey | Reservation | 06/06/1967 | |
| GUINEA | Accession | 12/12/1994 | 12/06/1995 |
| HAITI | Accession | 04/11/1954 | 24/02/1956 |
| HOLY SEE | Signature | 04/02/1954 | |
| HOLY SEE | Ratification | 10/08/1956 | |
| Hong Kong | Extension | 29/03/1963 | 29/09/1963 |
| Hong Kong | Reservation | 29/03/1963 | |
| HONG KONG SAR | Application | | 01/07/1997 |
| IRELAND, REPUBLIC OF | Accession | 17/10/1989 | 17/04/1990 |
| IRELAND, REPUBLIC OF | Reservation | 17/10/1989 | |
| Isle of Man | Extension | 14/04/1993 | 14/10/1993 |
| ITALY | Signature | 10/05/1952 | |
| ITALY | Ratification | 09/11/1979 | 09/05/1980 |
| ITALY | Reservation | 09/11/1979 | |
| KIRIBATI | Accession | 21/09/1965 | 21/03/1966 |
| Land Berlin | Extension | 06/10/1972 | 06/04/1973 |
| Land Berlin | Reservation | 06/10/1972 | |
| LATVIA | Accession | 17/05/1993 | 17/11/1993 |
| LEBANON | Signature | 25/05/1954 | |
| LITHUANIA | Accession | 29/10/2002 | 29/10/2002 |
| LUXEMBOURG | Accession | 18/02/1991 | 18/08/1991 |
| Macao | Extension | 23/03/1999 | 23/09/1999 |
| MACAU | Extension | | 20/12/1999 |
| MALAGASY REPUBLIC | Succession | 13/07/1965 | |
| MALI | Accession | 23/04/1958 | 23/10/1958 |
| MAURITANIA | Accession | 23/04/1958 | 23/10/1958 |
| Mauritius | Extension | 29/03/1963 | |
| Mauritius | Reservation | 29/03/1963 | |
| MONACO | Signature | 10/05/1952 | |
| Montserrat | Extension | 12/11/1965 | 12/11/1965 |
| Montserrat | Reservation | 12/11/1965 | |
| MOROCCO | Accession | 11/07/1990 | 11/01/1991 |
| NAMIBIA | Accession | 14/03/2002 | 14/09/2002 |
| NETHERLANDS THE | Signature | 16/07/1981 | |
| NETHERLANDS THE | Ratification | 20/01/1983 | 20/07/1983 |
| NETHERLANDS THE | Reservation | 20/01/1983 | |
| NICARAGUA | Signature | 10/05/1952 | |
| NIGER | Accession | 23/04/1958 | 23/10/1958 |
| NIGERIA | Accession | 07/11/1963 | 07/05/1964 |
| NIGERIA | Reservation | 07/11/1963 | |
| North Borneo | Extension | 29/03/1963 | |
| North Borneo | Reservation | 29/03/1963 | |
| NORWAY | Signature | 25/10/1994 | |
| NORWAY | Ratification | 01/11/1994 | 01/05/1995 |
| NORWAY | Reservation | 01/11/1994 | |
| NORWAY | Notification | 08/02/1995 | |
| PARAGUAY | Accession | 22/11/1967 | 22/05/1968 |
| POLAND | Accession | 16/07/1976 | 16/01/1977 |
| PORTUGAL | Signature | 16/10/1956 | |
| PORTUGAL | Ratification | 04/05/1957 | 04/11/1957 |
| PORTUGAL | Communication | 20/10/1999 | |
| ROMANIA | Accession | 28/11/1995 | 28/05/1996 |
| RUSSIAN FEDERATION | Accession | 29/04/1999 | 29/10/1999 |
| RUSSIAN FEDERATION | Reservation | 29/04/1999 | |
| SAINT LUCIA | Declaration | 09/03/1990 | |
| Sarawak | Extension | 28/08/1962 | |
| Sarawak | Reservation | 28/08/1962 | |
| SENEGAL | Accession | 23/04/1958 | 23/10/1958 |
| Seychelles | Extension | 29/03/1963 | |
| Seychelles | Reservation | 29/03/1963 | |
| SLOVENIA | Succession | 13/10/1993 | 25/06/1991 |
| Solomon Islands | Extension | 21/03/1966 | 21/03/1966 |
| Solomon Islands | Reservation | 21/03/1966 | |
| SOLOMON ISLANDS | Succession | 17/09/1981 | 07/07/1978 |
| SPAIN | Signature | 10/05/1952 | |
| SPAIN | Ratification | 08/12/1953 | 24/02/1956 |
| SPAIN | Denunciation | 28/03/2011 | 28/03/2012 |
| St Christopher, Nevis and Anguilla | Extension | 12/05/1965 | 12/11/1965 |
| St Christopher, Nevis and Anguilla | Reservation | 12/11/1965 | |
| St Helena | Extension | 12/11/1965 | 12/11/1965 |
| St Helena | Reservation | 12/11/1965 | |
| St Lucia | Extension | 12/05/1965 | 12/11/1965 |
| St Lucia | Reservation | 12/11/1965 | |
| St Lucia | Declaration | 09/03/1990 | |
| St Vincent | Extension | 12/05/1965 | 12/11/1965 |
| St Vincent | Reservation | 12/11/1965 | |
| ST VINCENT AND THE GRENADINES | Succession | 15/02/2002 | 28/10/1979 |
| SWEDEN | Accession | 30/04/1993 | 30/10/1993 |
| SWITZERLAND | Accession | 28/05/1954 | 24/02/1956 |
| SYRIA | Accession | 03/02/1972 | 03/08/1972 |
| TONGA | Accession | 13/06/1978 | 13/12/1978 |
| Turks And Caicos Islands | Extension | 21/03/1966 | 21/03/1966 |
| Turks And Caicos Islands | Reservation | 21/03/1966 | |
| TUVALU | Accession | 21/09/1965 | 21/03/1966 |
| UKRAINE | Accession | 16/11/2011 | 16/05/2012 |
| UNITED KINGDOM | Reservation | 10/05/1952 | |
| UNITED KINGDOM | Signature | 10/05/1952 | |
| UNITED KINGDOM | Ratification | 18/03/1959 | 18/09/1959 |
| YUGOSLAVIA | Signature | 10/05/1952 | |
| YUGOSLAVIA | Reservation | 10/05/1952 | |
| YUGOSLAVIA | Ratification | 25/07/1967 | 25/01/1968 |
| YUGOSLAVIA | Reservation | 25/07/1967 | |
| ZAIRE | Accession | 17/07/1967 | 17/01/1968 |