| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Accession | 04/06/1998 | |
| ANDORRA | Accession | 24/11/1998 | 24/11/1998 |
| ARMENIA | Accession | 25/06/2001 | 25/06/2001 |
| AUSTRIA | Accession | 09/05/1957 | |
| BELGIUM | Signature | 02/09/1949 | |
| BELGIUM | Ratification | 05/04/1951 | |
| BOSNIA AND HERZEGOVINA | Accession | 03/10/2003 | 03/10/2003 |
| BULGARIA | Accession | 07/05/1992 | 07/05/1992 |
| CROATIA | Succession | 11/10/1997 | 11/10/1997 |
| CYPRUS | Accession | 30/11/1967 | |
| CZECH REPUBLIC | Succession | 28/04/1995 | 28/04/1995 |
| DENMARK | Signature | 02/09/1949 | |
| DENMARK | Ratification | 02/09/1953 | |
| ESTONIA | Accession | 11/01/1995 | 11/01/1995 |
| FINLAND | Accession | 16/11/1989 | 16/11/1989 |
| FRANCE | Signature | 08/03/1950 | |
| FRANCE | Application | 10/03/1978 | |
| GEORGIA | Accession | 25/05/2000 | 25/05/2000 |
| GERMANY FEDERAL REPUBLIC | Accession | 10/09/1954 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 31/03/1955 | |
| GREECE | Signature | 06/11/1952 | |
| GREECE | Ratification | 17/11/1953 | |
| HUNGARY | Accession | 06/11/1990 | 06/11/1990 |
| ICELAND | Accession | 11/03/1955 | |
| IRELAND, REPUBLIC OF | Signature | 15/12/1956 | |
| IRELAND, REPUBLIC OF | Ratification | 21/09/1967 | |
| ITALY | Signature | 02/09/1949 | |
| ITALY | Ratification | 07/02/1952 | |
| Land Berlin | Extension | 31/03/1955 | 16/09/1954 |
| LATVIA | Accession | 15/01/1998 | 15/01/1998 |
| LIECHTENSTEIN | Accession | 16/05/1979 | |
| LIECHTENSTEIN | Reservation | 16/05/1979 | |
| LITHUANIA | Accession | 22/07/1998 | 22/07/1998 |
| LUXEMBOURG | Signature | 02/09/1949 | |
| LUXEMBOURG | Ratification | 10/09/1952 | |
| MACEDONIA THE FYR OF | Accession | 10/04/1997 | 10/04/1997 |
| MALTA | Accession | 22/01/1969 | |
| MOLDOVA REPUBLIC OF | Accession | 02/10/1997 | 02/10/1997 |
| MONACO | Accession | 30/11/2005 | 30/11/2005 |
| MONTENEGRO | Accession | 11/07/2008 | 11/07/2008 |
| NETHERLANDS THE | Signature | 02/09/1949 | |
| NETHERLANDS THE | Ratification | 18/03/1950 | |
| NORWAY | Signature | 02/09/1949 | |
| NORWAY | Ratification | 01/12/1949 | |
| POLAND | Accession | 16/03/1993 | 16/03/1993 |
| PORTUGAL | Accession | 06/07/1982 | |
| ROMANIA | Accession | 04/10/1994 | 04/10/1994 |
| RUSSIAN FEDERATION | Accession | 28/02/1996 | 28/02/1996 |
| SAN MARINO | Accession | 22/03/1989 | |
| SERBIA AND MONTENEGRO | Accession | 26/04/2005 | 26/04/2005 |
| SLOVAK REPUBLIC | Succession | 05/12/1996 | 05/12/1996 |
| SLOVENIA | Succession | 08/11/1994 | 08/11/1994 |
| SPAIN | Accession | 23/06/1982 | |
| SWEDEN | Signature | 02/09/1949 | |
| SWEDEN | Ratification | 07/09/1950 | |
| SWITZERLAND | Accession | 29/11/1965 | |
| TURKEY | Signature | 02/09/1949 | |
| TURKEY | Ratification | 07/01/1960 | |
| UKRAINE | Accession | 06/11/1996 | 06/11/1996 |
| UNITED KINGDOM | Signature | 02/09/1949 | |
| UNITED KINGDOM | Ratification | 29/09/1950 | |