| Country | Action | Action Date | Effective Date |
|---|
| ARGENTINA | Acceptance | 29/01/1980 | 29/03/1980 |
| BELGIUM | Acceptance | 20/04/1970 | 01/01/1900 |
| CANADA | Acceptance | 12/12/1970 | 01/01/1900 |
| COTE D'IVOIRE | Acceptance | 05/04/1971 | 01/01/1900 |
| DENMARK | Acceptance | 30/11/1970 | 01/01/1900 |
| FINLAND | Acceptance | 17/11/1970 | 01/01/1900 |
| FRANCE | Acceptance | 09/11/1970 | 01/01/1900 |
| GERMANY FEDERAL REPUBLIC | Acceptance | 30/11/1970 | 01/01/1900 |
| GHANA | Acceptance | 11/02/1971 | 01/01/1900 |
| ICELAND | Acceptance | 28/12/1970 | 01/01/1900 |
| NETHERLANDS THE | Acceptance | 18/11/1970 | 01/01/1900 |
| NIGERIA | Acceptance | 30/06/1971 | 01/01/1900 |
| NORWAY | Acceptance | 27/11/1970 | 01/01/1900 |
| POLAND | Acceptance | 14/09/1971 | 01/01/1900 |
| SINGAPORE | Acceptance | 02/11/1970 | 01/01/1900 |
| SPAIN | Acceptance | 08/01/1975 | 01/01/1900 |
| SWEDEN | Acceptance | 27/11/1970 | 01/01/1900 |
| SWITZERLAND | Acceptance | 12/07/1971 | 01/01/1900 |
| TUNISIA | Acceptance | 23/11/1972 | 01/01/1900 |
| UNITED KINGDOM | Ratification | 02/11/1970 | 01/01/1900 |
| UNITED STATES OF AMERICA | Acceptance | 31/12/1970 | 01/01/1900 |
| YUGOSLAVIA | Acceptance | 18/12/1970 | 01/01/1900 |