| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| AFGHANISTAN | Signature | 29/03/1948 | |
| Ascension Island | Extension | 06/03/1948 | |
| AUSTRALIA | Signature | 19/03/1948 | |
| AUSTRIA | Signature | 29/03/1948 | |
| Bahamas | Extension | 06/03/1948 | |
| Bahrain | Extension | 06/03/1948 | |
| Barbados | Extension | 06/03/1948 | |
| Basutoland | Extension | 06/03/1948 | |
| Bechuanaland | Extension | 06/03/1948 | |
| BELGIUM | Signature | 18/03/1948 | |
| Bermuda | Extension | 06/03/1948 | |
| BRAZIL | Signature | 30/03/1948 | |
| British Guiana | Extension | 06/03/1948 | |
| British Honduras | Extension | 06/03/1948 | |
| British Solomon Islands | Extension | 06/03/1948 | |
| Brunei | Extension | 06/03/1948 | |
| CANADA | Signature | 06/03/1948 | |
| Cayman Islands | Extension | 06/03/1948 | |
| Ceylon | Extension | 06/03/1948 | |
| CHINA | Signature | 06/03/1948 | |
| COLOMBIA | Signature | 06/03/1948 | |
| CUBA | Signature | 25/03/1948 | |
| Cyprus | Extension | 06/03/1948 | |
| CZECHOSLOVAKIA | Signature | 30/03/1948 | |
| DOMINICAN REPUBLIC | Signature | 30/03/1948 | |
| ECUADOR | Signature | 31/03/1948 | |
| EGYPT | Signature | 06/03/1948 | |
| Falkland Islands | Extension | 06/03/1948 | |
| Fiji | Extension | 06/03/1948 | |
| FRANCE | Signature | 30/03/1948 | |
| Gibraltar | Extension | 06/03/1948 | |
| Gilbert & Ellice Colony | Extension | 06/03/1948 | |
| Gold Coast | Extension | 06/03/1948 | |
| GREECE | Signature | 06/03/1948 | |
| Greenland | Extension | 06/03/1948 | |
| GUATEMALA | Signature | 31/03/1948 | |
| Hong Kong | Extension | 06/03/1948 | |
| INDIA | Signature | 06/03/1948 | |
| IRELAND, REPUBLIC OF | Signature | 06/03/1948 | |
| ITALY | Signature | 29/03/1948 | |
| Jamaica | Extension | 06/03/1948 | |
| Kenya | Extension | 06/03/1948 | |
| Kuwait | Extension | 06/03/1948 | |
| LEBANON | Signature | 06/03/1948 | |
| Leeward Islands | Extension | 06/03/1948 | |
| LIBERIA | Signature | 06/03/1948 | |
| Malaya | Extension | 06/03/1948 | |
| Malta | Extension | 06/03/1948 | |
| Mauritius | Extension | 06/03/1948 | |
| MEXICO | Signature | 29/03/1948 | |
| Muscat | Extension | 06/03/1948 | |
| Nauru | Extension | 19/03/1948 | |
| NETHERLANDS THE | Signature | 06/03/1948 | |
| Netherlands West Indies | Extension | 06/03/1948 | |
| New Guinea | Extension | 19/03/1948 | |
| New Hebrides | Extension | 06/03/1948 | |
| NEW ZEALAND | Signature | 24/03/1948 | |
| Newfoundland (UK) | Extension | 06/03/1948 | |
| Nigeria | Extension | 06/03/1948 | |
| North Borneo | Extension | 06/03/1948 | |
| Northern Rhodesia | Extension | 06/03/1948 | |
| NORWAY | Signature | 23/03/1948 | |
| Nyasaland | Extension | 06/03/1948 | |
| Ocean Island | Extension | 19/03/1948 | |
| Papua | Extension | 19/03/1948 | |
| PERU | Signature | 06/03/1948 | |
| PHILIPPINES | Signature | 19/03/1948 | |
| POLAND | Signature | 31/03/1948 | |
| PORTUGAL | Signature | 06/03/1948 | |
| Sarawak | Extension | 06/03/1948 | |
| Seychelles | Extension | 06/03/1948 | |
| Sierra Leone | Extension | 06/03/1948 | |
| Singapore | Extension | 06/03/1948 | |
| Somaliland Protectorate | Extension | 06/03/1948 | |
| SOUTH AFRICA | Signature | 26/03/1948 | |
| South Georgia And South Sandwich Islands | Extension | 06/03/1948 | |
| Southern Rhodesia | Extension | 06/03/1948 | |
| St Helena | Extension | 06/03/1948 | |
| Swaziland | Extension | 06/03/1948 | |
| SWEDEN | Signature | 30/03/1948 | |
| SWITZERLAND | Signature | 25/03/1948 | |
| Tanganyika | Extension | 06/03/1948 | |
| The Gambia | Extension | 06/03/1948 | |
| Tonga | Extension | 06/03/1948 | |
| Trinidad And Tobago | Extension | 06/03/1948 | |
| Tristan Da Cunha | Extension | 06/03/1948 | |
| Trucial States | Extension | 06/03/1948 | |
| Turks And Caicos Islands | Extension | 06/03/1948 | |
| Uganda | Extension | 06/03/1948 | |
| UNITED KINGDOM | Signature | 06/03/1948 | |
| UNITED KINGDOM | Ratification | 25/06/1948 | |
| UNITED KINGDOM | Acceptance | 25/06/1948 | |
| UNITED KINGDOM | Withdrawal | 06/07/1948 | |
| UNITED STATES OF AMERICA | Signature | 06/03/1948 | |
| VENEZUELA | Signature | 30/03/1948 | |
| Western Samoa | Extension | 24/03/1948 | |
| Windward Islands | Extension | 06/03/1948 | |
| Zanzibar | Extension | 06/03/1948 |