| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| BELGIUM | Approval | 14/11/1990 | |
| EUROPEAN COMMUNITY | Approval | 09/02/1994 | 01/04/1994 |
| FRANCE | Approval | 11/12/1992 | |
| GERMANY FEDERAL REPUBLIC | Approval | 28/02/1991 | |
| NORWAY | Approval | 11/11/1992 | |
| SWEDEN | Approval | 28/06/1990 | |
| UNITED KINGDOM | Ratification | 13/07/1990 | |
| UNITED KINGDOM | Approval | 13/07/1990 | 01/04/1994 |