| Country | Action | Action Date | Effective Date |
|---|
| CROATIA | Signature | 22/12/1999 | |
| DENMARK | Signature | 08/01/1997 | |
| ESTONIA | Signature | 29/07/1999 | |
| FINLAND | Signature | 25/03/1997 | |
| GERMANY | Signature | 04/09/1997 | |
| GERMANY | Ratification | 10/06/1999 | |
| LIECHTENSTEIN | Signature | 22/07/1998 | |
| LIECHTENSTEIN | Ratification | 06/11/1998 | |
| LUXEMBOURG | Signature | 19/11/1996 | |
| LUXEMBOURG | Ratification | 03/06/1999 | |
| NORWAY | Signature | 01/05/1997 | |
| PORTUGAL | Signature | 28/02/1997 | |
| PORTUGAL | Ratification | 25/05/1998 | |
| ROMANIA | Signature | 25/06/1998 | |
| ROMANIA | Ratification | 25/02/1999 | |
| SLOVAK REPUBLIC | Signature | 30/06/1998 | |
| SLOVENIA | Signature | 02/07/1998 | |
| SPAIN | Signature | 04/02/1998 | |
| SPAIN | Ratification | 05/03/1999 | |
| SWITZERLAND | Signature | 07/03/1997 | |
| SWITZERLAND | Ratification | 11/02/1999 | |
| UNITED KINGDOM | Signature | 02/07/1998 | |