| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AUSTRIA | Acceptance | 16/02/1981 | |
| AUSTRIA | Reservation | 16/02/1981 | |
| EUROPEAN ECONOMIC COMMUNITY | Acceptance | 28/10/1988 | |
| EUROPEAN ECONOMIC COMMUNITY | Reservation | 28/10/1988 | |
| FRANCE | Acceptance | 03/03/1989 | |
| FRANCE | Reservation | 03/03/1989 | |
| GERMANY FEDERAL REPUBLIC | Acceptance | 02/02/1989 | |
| GERMANY FEDERAL REPUBLIC | Reservation | 02/02/1989 | |
| NETHERLANDS THE | Acceptance | 27/07/1989 | 27/10/1989 |
| NETHERLANDS THE | Reservation | 27/07/1989 | |
| SPAIN | Acceptance | 21/09/1991 | 21/09/1991 |
| SPAIN | Reservation | 21/09/1991 | |
| SWITZERLAND | Acceptance | 25/07/1985 | |
| SWITZERLAND | Reservation | 25/07/1985 | |
| UNITED KINGDOM | Acceptance | 10/09/1991 | 10/12/1991 |
| UNITED KINGDOM | Reservation | 10/09/1991 |