| Country | Action | Action Date | Effective Date |
|---|
| Aden Colony | Extension | 01/08/1966 | |
| Anguilla | Extension | 01/08/1966 | |
| Antigua | Extension | 01/08/1966 | |
| Bahamas | Extension | 01/08/1966 | |
| Barbados | Extension | 01/08/1966 | |
| Basutoland | Extension | 01/08/1966 | |
| Bermuda | Extension | 01/08/1966 | |
| British Antarctic Territory | Extension | 01/08/1966 | |
| British Honduras | Extension | 01/08/1966 | |
| British Indian Ocean Territory | Extension | 01/08/1966 | |
| Cayman Islands | Extension | 01/08/1966 | |
| Dominica | Extension | 01/08/1966 | |
| Falkland Islands | Extension | 01/08/1966 | |
| Fiji | Extension | 01/08/1966 | |
| Gibraltar | Extension | 06/06/1966 | 01/08/1966 |
| Gilbert And Ellice Islands | Extension | 01/08/1966 | |
| Grenada | Extension | 01/08/1966 | |
| Hong Kong | Extension | 01/08/1966 | |
| Mauritius | Extension | 01/08/1966 | |
| Montserrat | Extension | 01/08/1966 | |
| Nevis | Extension | 01/08/1966 | |
| Pitcairn Islands | Extension | 01/08/1966 | |
| Seychelles | Extension | 01/08/1966 | |
| Southern Rhodesia | Extension | 01/08/1966 | |
| Sovereign Base Areas | Extension | 06/06/1966 | |
| St Helena | Extension | 01/08/1966 | |
| St Lucia | Extension | 01/08/1966 | |
| St Vincent | Extension | 01/08/1966 | |
| St. Christopher And Nevis | Extension | 01/08/1966 | |
| SWEDEN | Signature | 06/06/1966 | |
| Turks And Caicos Islands | Extension | 01/08/1966 | |
| UNITED KINGDOM | Signature | 06/06/1966 | 01/08/1966 |
| Virgin Islands | Extension | 01/08/1966 | |