| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AUSTRALIA | Signature | 11/05/1948 | |
| CANADA | Signature | 11/05/1948 | |
| CEYLON | Adherence | 01/06/1951 | |
| CYPRUS | Adherence | 01/04/1961 | |
| GHANA | Adherence | 03/04/1962 | |
| INDIA | Signature | 11/05/1948 | |
| MALAYA | Adherence | 01/09/1962 | |
| NEW ZEALAND | Signature | 11/05/1948 | |
| NIGERIA | Adherence | 12/03/1962 | |
| Rhodesia And Nyasaland | Signature | 01/07/1954 | |
| SOUTH AFRICA | Signature | 11/05/1948 | |
| SOUTH AFRICA | Withdrawal | 31/05/1961 | |
| UNITED KINGDOM | Signature | 11/05/1948 |