| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ARGENTINA | Approval | 20/07/1981 | |
| AUSTRALIA | Approval | 01/09/1980 | |
| BELGIUM | Approval | 21/05/1981 | |
| CHILE | Approval | 24/06/1981 | |
| FRANCE | Approval | 03/06/1985 | |
| GERMAN DEMOCRATIC REPUBLIC | Approval | 23/08/1988 | |
| GERMANY FEDERAL REPUBLIC | Approval | 04/08/1983 | |
| JAPAN | Approval | 26/05/1981 | |
| NEW ZEALAND | Approval | 15/06/1981 | |
| NORWAY | Approval | 28/05/1982 | |
| POLAND | Approval | 10/06/1981 | |
| SOUTH AFRICA | Approval | 29/12/1980 | |
| SOVIET UNION | Approval | 03/06/1982 | |
| UNITED KINGDOM | Approval | 16/04/1987 | |
| UNITED STATES OF AMERICA | Approval | 29/06/1981 |