| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AFGHANISTAN | Accession | 19/12/1977 | |
| ALGERIA | Accession | 31/10/1963 | |
| ALGERIA | Reservation | 31/10/1963 | |
| AUSTRIA | Signature | 18/05/1956 | |
| AUSTRIA | Ratification | 13/11/1957 | |
| AZERBAIJAN | Accession | 08/05/2000 | 06/08/2000 |
| BELGIUM | Signature | 18/05/1956 | |
| BELGIUM | Ratification | 18/02/1963 | |
| BOSNIA AND HERZEGOVINA | Succession | 12/01/1994 | 06/03/1992 |
| Brunei | Extension | 06/11/1959 | 04/02/1960 |
| BULGARIA | Accession | 07/10/1959 | |
| BULGARIA | Reservation | 07/10/1959 | |
| BULGARIA | Withdrawal Res. | 06/05/1994 | |
| CAMBODIA | Accession | 08/04/1959 | |
| CROATIA | Succession | 31/08/1994 | 08/10/1991 |
| CUBA | Accession | 16/09/1965 | |
| Cyprus | Extension | 29/04/1960 | 28/07/1960 |
| CYPRUS | Succession | 02/02/1983 | |
| DENMARK | Accession | 08/01/1959 | |
| EUROPEAN COMMUNITY | Accession | 01/02/1996 | 01/05/1996 |
| EUROPEAN COMMUNITY | Notification | 01/02/1996 | |
| FINLAND | Accession | 23/05/1967 | |
| FRANCE | Signature | 18/05/1956 | |
| FRANCE | Ratification | 20/05/1959 | |
| GERMANY FEDERAL REPUBLIC | Signature | 18/05/1956 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 23/10/1961 | |
| Gibraltar | Extension | 06/11/1959 | 04/02/1960 |
| GREECE | Accession | 12/09/1961 | |
| Guernsey, Bailiwick of | Extension | 30/07/1959 | |
| Hong Kong | Extension | 21/09/1960 | 20/12/1960 |
| HUNGARY | Signature | 18/05/1956 | |
| HUNGARY | Ratification | 23/07/1957 | |
| HUNGARY | Withdrawal Obj. | 03/10/1990 | 03/10/1990 |
| IRELAND, REPUBLIC OF | Accession | 26/07/1967 | |
| Isle of Man | Extension | 30/07/1959 | |
| ITALY | Signature | 18/05/1956 | |
| ITALY | Ratification | 29/03/1962 | |
| Jersey | Extension | 30/07/1959 | |
| Kenya | Extension | 19/07/1962 | 17/10/1962 |
| Land Berlin | Extension | 23/10/1961 | |
| Land Berlin | Communication | 30/11/1961 | |
| LIECHTENSTEIN | Extension | 07/07/1960 | |
| LITHUANIA | Accession | 03/01/2003 | 03/04/2003 |
| LUXEMBOURG | Signature | 18/05/1956 | |
| LUXEMBOURG | Ratification | 28/01/1964 | |
| MACEDONIA THE FYR OF | Succession | 20/12/1999 | 17/11/1991 |
| MONTENEGRO | Succession | 23/10/2006 | 03/06/2006 |
| NETHERLANDS THE | Signature | 18/05/1956 | |
| NETHERLANDS THE | Ratification | 27/07/1960 | |
| North Borneo | Extension | 06/11/1959 | 04/02/1960 |
| NORWAY | Accession | 11/07/1966 | |
| POLAND | Signature | 18/05/1956 | |
| POLAND | Reservation | 18/05/1956 | |
| POLAND | Ratification | 06/05/1959 | |
| POLAND | Reservation | 06/05/1959 | |
| PORTUGAL | Accession | 08/05/1967 | |
| ROMANIA | Accession | 07/01/1966 | |
| ROMANIA | Reservation | 07/01/1966 | |
| SAUDI ARABIA | Accession | 23/01/2003 | 23/04/2003 |
| Seychelles | Extension | 06/11/1959 | 04/02/1960 |
| Sierra Leone | Extension | 12/09/1960 | 11/12/1960 |
| SIERRA LEONE | Succession | 13/03/1962 | |
| Singapore | Extension | 06/11/1959 | 04/02/1960 |
| SINGAPORE | Succession | 15/08/1966 | |
| SLOVENIA | Succession | 03/11/1992 | 25/01/1992 |
| Somaliland Protectorate | Extension | 06/11/1959 | 04/02/1960 |
| SPAIN | Accession | 17/11/1958 | |
| SWEDEN | Signature | 18/05/1956 | |
| SWEDEN | Ratification | 16/01/1958 | |
| SWITZERLAND | Signature | 18/05/1956 | |
| SWITZERLAND | Ratification | 07/07/1960 | |
| The Gambia | Extension | 29/04/1960 | 28/07/1960 |
| TURKEY | Accession | 10/05/2005 | 08/08/2005 |
| Uganda | Extension | 19/07/1962 | 17/10/1962 |
| UNITED KINGDOM | Signature | 18/05/1956 | |
| UNITED KINGDOM | Ratification | 30/07/1959 | |
| UZBEKISTAN | Accession | 11/01/1999 | 11/04/1999 |
| YUGOSLAVIA | Accession | 12/06/1961 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Succession | 12/03/2001 | 27/04/1992 |