| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Accession | 06/09/2011 | 05/12/2011 |
| ARMENIA | Accession | 21/01/2014 | 21/04/2014 |
| AUSTRIA | Accession | 04/06/1987 | |
| BELGIUM | Signature | 25/02/1985 | |
| BELGIUM | Ratification | 05/08/1987 | |
| Berlin West | Extension | 07/10/1986 | |
| BOSNIA AND HERZEGOVINA | Succession | 01/09/1993 | 06/03/1992 |
| BULGARIA | Signature | 04/04/1985 | |
| BULGARIA | Approval | 26/09/1986 | |
| BYELORUSSIA S S R | Signature | 28/09/1984 | |
| BYELORUSSIA S S R | Acceptance | 04/10/1985 | |
| CANADA | Signature | 03/10/1984 | |
| CANADA | Ratification | 04/12/1985 | |
| CROATIA | Succession | 21/09/1992 | 08/10/1991 |
| CYPRUS | Accession | 20/11/1991 | 18/02/1992 |
| CZECH REPUBLIC | Succession | 30/09/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Accession | 26/11/1986 | |
| DENMARK | Signature | 28/09/1984 | |
| DENMARK | Ratification | 29/04/1986 | |
| ESTONIA | Accession | 07/12/2001 | 07/03/2002 |
| EUROPEAN ECONOMIC COMMUNITY | Signature | 28/09/1984 | |
| EUROPEAN ECONOMIC COMMUNITY | Notification | 29/06/1986 | |
| EUROPEAN ECONOMIC COMMUNITY | Approval | 17/07/1986 | |
| FINLAND | Signature | 07/12/1984 | |
| FINLAND | Ratification | 24/06/1986 | |
| FRANCE | Signature | 22/02/1985 | |
| FRANCE | Approval | 30/10/1987 | |
| GEORGIA | Accession | 07/02/2013 | 08/05/2013 |
| GERMAN DEMOCRATIC REPUBLIC | Accession | 17/12/1986 | |
| GERMAN DEMOCRATIC REPUBLIC | Declaration | 17/12/1986 | |
| GERMANY FEDERAL REPUBLIC | Signature | 26/02/1985 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 07/10/1986 | |
| GREECE | Accession | 24/06/1988 | 22/09/1988 |
| GUINEA BISSAU | | | |
| HUNGARY | Signature | 27/03/1985 | |
| HUNGARY | Approval | 08/05/1985 | |
| IRELAND, REPUBLIC OF | Signature | 04/04/1985 | |
| IRELAND, REPUBLIC OF | Ratification | 26/06/1987 | |
| ITALY | Signature | 28/09/1984 | |
| ITALY | Ratification | 12/01/1989 | 12/04/1989 |
| LATVIA | Accession | 18/02/1997 | 19/05/1997 |
| LIECHTENSTEIN | Accession | 01/05/1985 | |
| LITHUANIA | Accession | 07/11/2003 | 05/02/2004 |
| LUXEMBOURG | Signature | 21/11/1984 | |
| LUXEMBOURG | Ratification | 24/08/1987 | |
| MACEDONIA THE FYR OF | Accession | 10/03/2010 | 08/06/2010 |
| MALTA | Accession | 14/03/1997 | 12/06/1997 |
| MONACO | Accession | 27/08/1999 | 25/11/1999 |
| MONTENEGRO | Succession | 23/10/2006 | 03/06/2006 |
| NETHERLANDS THE | Signature | 28/09/1984 | |
| NETHERLANDS THE | Acceptance | 22/10/1985 | |
| NORWAY | Signature | 28/09/1984 | |
| NORWAY | Acceptance | 12/03/1985 | |
| POLAND | Accession | 14/09/1988 | 13/12/1988 |
| PORTUGAL | Accession | 19/01/1989 | 19/04/1989 |
| ROMANIA | Accession | 28/04/2003 | 27/07/2003 |
| SLOVAK REPUBLIC | Succession | 28/05/1993 | 01/01/1993 |
| SLOVENIA | Succession | 01/07/1992 | 25/06/1991 |
| SOVIET UNION | Signature | 28/09/1984 | |
| SOVIET UNION | Acceptance | 21/08/1985 | |
| SPAIN | Accession | 11/08/1987 | |
| SWEDEN | Signature | 28/09/1984 | |
| SWEDEN | Ratification | 12/08/1985 | |
| SWITZERLAND | Signature | 03/10/1984 | |
| SWITZERLAND | Ratification | 26/07/1985 | |
| TURKEY | Signature | 03/10/1984 | |
| TURKEY | Ratification | 20/12/1985 | |
| UKRAINE S S R | Signature | 28/09/1984 | |
| UKRAINE S S R | Acceptance | 30/08/1985 | |
| UNITED KINGDOM | Signature | 20/11/1984 | |
| UNITED KINGDOM | Ratification | 12/08/1985 | |
| UNITED STATES OF AMERICA | Signature | 28/09/1984 | |
| UNITED STATES OF AMERICA | Acceptance | 29/10/1984 | |
| YUGOSLAVIA | Accession | 28/10/1987 | |
| YUGOSLAVIA, FEDERAL REPUBLIC OF | Succession | 12/03/2001 | 27/04/2001 |