| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Aden Colony | Extension | 28/10/1948 | |
| BAHAMAS | Extension | 28/10/1948 | |
| Barbados | Extension | 28/10/1948 | |
| Basutoland | Extension | 28/10/1948 | |
| Bechuanaland | Extension | 28/10/1948 | |
| Bermuda | Extension | 28/10/1948 | |
| British Guiana | Extension | 28/10/1948 | |
| British Honduras | Extension | 28/10/1948 | |
| British Solomon Islands | Extension | 28/10/1948 | |
| Brunei | Extension | 28/10/1948 | |
| CYPRUS | Extension | 28/10/1948 | |
| Falkland Islands | Extension | 28/10/1948 | |
| FIJI | Extension | 28/10/1948 | |
| Gibraltar | Extension | 04/07/1955 | |
| Gilbert And Ellice Islands | Extension | 28/10/1948 | |
| ITALY | Signature | 26/10/1948 | |
| JAMAICA | Extension | 28/10/1948 | |
| Leeward Islands | Extension | 28/10/1948 | |
| Malay States, Federated | Extension | 28/10/1948 | |
| MAURITIUS | Extension | 28/10/1948 | |
| North Borneo | Extension | 28/10/1948 | |
| Northern Rhodesia | Extension | 28/10/1948 | |
| SEYCHELLES | Extension | 28/10/1948 | |
| SIERRA LEONE | Extension | 28/10/1948 | |
| SINGAPORE | Extension | 28/10/1948 | |
| St Helena And Ascension | Extension | 28/10/1948 | |
| SWAZILAND | Extension | 28/10/1948 | |
| Tanganyika | Extension | 28/10/1948 | |
| The Gambia | Extension | 03/09/1958 | |
| TRINIDAD AND TOBAGO | Extension | 28/10/1948 | |
| UGANDA | Extension | 28/10/1948 | |
| UNITED KINGDOM | Signature | 26/10/1948 | |
| Windward Islands | Extension | 28/10/1948 | |
| Zanzibar | Extension | 28/10/1948 |