| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ARGENTINA | Approval | 20/04/1988 | |
| BELGIUM | Approval | 20/07/1987 | |
| GERMAN DEMOCRATIC REPUBLIC | Approval | 23/08/1988 | |
| GERMANY FEDERAL REPUBLIC | Approval | 19/03/1987 | |
| JAPAN | Approval | 25/12/1987 | |
| JAPAN | Approval | 04/11/1989 | |
| NEW ZEALAND | Approval | 08/04/1987 | |
| POLAND | Approval | 08/09/1989 | |
| SOUTH AFRICA | Approval | 31/10/1986 | |
| SOVIET UNION | Approval | 31/12/1987 | |
| UNITED KINGDOM | Approval | 07/09/1987 | |
| UNITED STATES OF AMERICA | Approval | 27/08/1987 |