| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AUSTRIA | Acceptance | 03/01/1990 | |
| DENMARK | Acceptance | 18/05/1992 | |
| FINLAND | Acceptance | 18/09/1991 | |
| HUNGARY | Accession | 01/12/2005 | 01/03/2006 |
| IRELAND, REPUBLIC OF | Acceptance | 06/02/1991 | |
| PORTUGAL | Acceptance | 16/07/1993 | |
| SWEDEN | Acceptance | 14/08/1989 | |
| SWITZERLAND | Acceptance | 17/07/1989 | |
| UNITED KINGDOM | Acceptance | 26/06/1990 |