| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALBANIA | Accession | 14/10/2008 | 12/01/2009 |
| Alderney | Extension | 15/01/1963 | |
| Antilles | Extension | 20/04/1959 | |
| Aruba | Extension | 01/01/1986 | |
| AUSTRALIA | Accession | 03/05/1961 | |
| AUSTRIA | Signature | 18/05/1956 | |
| AUSTRIA | Ratification | 12/11/1958 | |
| BELGIUM | Signature | 18/05/1956 | |
| BOSNIA AND HERZEGOVINA | Succession | 12/01/1994 | 06/03/1992 |
| British Guiana | Extension | 08/11/1963 | 06/02/1964 |
| British Virgin Islands | Extension | 18/07/1963 | |
| Brunei | Extension | 08/11/1963 | 06/02/1964 |
| CAMBODIA | Accession | 22/09/1959 | |
| CZECH REPUBLIC | Succession | 02/06/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Accession | 02/07/1962 | |
| CZECHOSLOVAKIA | Declaration | 02/07/1962 | |
| DENMARK | Accession | 09/02/1968 | |
| Falkland Islands | Extension | 06/06/1963 | |
| FINLAND | Definitive Signature | 18/05/1956 | |
| FRANCE | Signature | 18/05/1956 | |
| FRANCE | Ratification | 20/05/1959 | |
| GERMANY FEDERAL REPUBLIC | Accession | 07/07/1961 | |
| GHANA | Accession | 18/08/1959 | |
| Gibraltar | Extension | 06/06/1963 | |
| Guernsey | Extension | 15/01/1963 | |
| IRELAND, REPUBLIC OF | Accession | 31/05/1962 | |
| Isle of Man | Extension | 15/01/1963 | |
| Jersey | Extension | 15/01/1963 | |
| Land Berlin | Extension | 07/07/1961 | |
| LUXEMBOURG | Signature | 18/05/1956 | |
| LUXEMBOURG | Ratification | 28/05/1965 | |
| MALTA | Accession | 22/11/1966 | |
| Mauritius | Extension | 06/05/1964 | 04/08/1964 |
| MONTENEGRO | Succession | 23/10/2006 | 03/06/2006 |
| Montserrat | Extension | 26/07/1963 | |
| NETHERLANDS THE | Signature | 18/05/1956 | |
| NETHERLANDS THE | Ratification | 20/04/1959 | |
| New Guinea | Extension | 20/04/1959 | |
| New Guinea | Extension | 03/05/1961 | |
| NORWAY | Accession | 09/07/1965 | |
| Papua | Extension | 03/05/1961 | |
| POLAND | Signature | 18/05/1956 | |
| POLAND | Reservation | 18/05/1956 | |
| POLAND | Ratification | 04/09/1969 | |
| POLAND | Reservation | 04/09/1969 | |
| POLAND | Objection | 24/09/1969 | |
| ROMANIA | Accession | 10/07/1967 | |
| ROMANIA | Declaration | 10/07/1967 | |
| Seychelles | Extension | 18/07/1963 | |
| SLOVAK REPUBLIC | Succession | 28/05/1993 | 01/01/1993 |
| St Lucia | Extension | 26/07/1963 | |
| St Vincent | Extension | 08/11/1963 | 06/02/1964 |
| ST VINCENT AND THE GRENADINES | Succession | 09/11/1981 | |
| Surinam | Extension | 20/04/1959 | |
| SWEDEN | Signature | 18/05/1956 | |
| SWEDEN | Ratification | 16/01/1958 | |
| UNITED KINGDOM | Signature | 18/05/1956 | |
| UNITED KINGDOM | Ratification | 15/01/1963 | |
| YUGOSLAVIA | Signature | 18/05/1956 | |
| YUGOSLAVIA | Ratification | 08/04/1960 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Succession | 12/03/2001 | 27/04/1992 |
| Zanzibar | Extension | 08/11/1963 | 06/02/1964 |