| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AUSTRALIA | Signature | 06/04/1964 | |
| CANADA | Signature | 06/04/1964 | |
| GERMANY FEDERAL REPUBLIC | Signature | 06/04/1964 | |
| INTERNATIONAL BANK FOR RECONSTRUCTION AND DEVELOPMENT | Signature | 31/03/1964 | |
| NEW ZEALAND | Signature | 06/04/1964 | |
| PAKISTAN | Signature | 06/04/1964 | |
| UNITED KINGDOM | Signature | 06/04/1964 | |
| UNITED STATES OF AMERICA | Signature | 31/03/1964 |