| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Ratification | 03/06/1957 | |
| ARGENTINA | Ratification | 14/03/1950 | |
| BRAZIL | Ratification | 22/09/1938 | |
| BULGARIA | Ratification | 29/12/1949 | |
| BURMA | Ratification | 21/05/1954 | |
| BURUNDI | Ratification | 30/07/1971 | |
| BYELORUSSIA S S R | Ratification | 06/11/1956 | |
| CAMEROON | Ratification | 25/05/1970 | |
| CENTRAL AFRICAN REPUBLIC | Ratification | 07/06/1964 | |
| CHAD | Ratification | 08/06/1961 | |
| COLOMBIA | Ratification | 07/06/1963 | |
| COMOROS | Succession | 23/10/1978 | |
| CUBA | Ratification | 20/07/1953 | |
| CZECH REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| CZECHOSLOVAKIA | Ratification | 12/06/1950 | |
| DENMARK | Ratification | 22/06/1939 | |
| DJIBOUTI | Succession | 03/08/1978 | |
| DOMINICAN REPUBLIC | Ratification | 05/12/1956 | |
| EGYPT | Ratification | 03/07/1954 | |
| FINLAND | Ratification | 23/08/1949 | |
| FRANCE | Ratification | 23/08/1939 | |
| GABON | Ratification | 13/06/1961 | |
| GREECE | Ratification | 13/06/1952 | |
| GUINEA | Ratification | 12/12/1966 | |
| HUNGARY | Ratification | 08/06/1956 | |
| IRAQ | Ratification | 12/05/1960 | |
| ISRAEL | Ratification | 22/08/1951 | |
| ITALY | Ratification | 22/10/1952 | |
| ITALY | Denunciation | 28/07/1981 | |
| IVORY COAST | Ratification | 05/05/1961 | |
| KUWAIT | Ratification | 21/09/1961 | |
| KYRGYZSTAN | Succession | 31/03/1992 | 31/03/1992 |
| LEBANON | Ratification | 26/07/1962 | |
| LIBYA | Ratification | 20/06/1962 | |
| MADAGASCAR | Ratification | 10/08/1962 | |
| MALI | Ratification | 12/07/1968 | |
| MAURITANIA | Ratification | 08/11/1963 | |
| MEXICO | Ratification | 09/03/1938 | |
| MOROCCO | Ratification | 20/09/1956 | |
| NEW ZEALAND | Ratification | 10/09/1950 | |
| PANAMA | Ratification | 03/06/1958 | |
| PARAGUAY | Ratification | 21/03/1966 | |
| PERU | Ratification | 01/02/1960 | |
| SENEGAL | Ratification | 22/10/1962 | |
| SLOVAK REPUBLIC | Succession | 01/01/1993 | 01/01/1993 |
| SOVIET UNION | Ratification | 10/08/1956 | |
| SPAIN | Ratification | 05/05/1971 | |
| SYRIA | Ratification | 30/10/1961 | |
| TAJIKISTAN | Succession | 26/11/1993 | |
| TUNISIA | Ratification | 15/05/1957 | |
| UKRAINE | Ratification | 14/09/1956 | |
| UNITED KINGDOM | | | |
| UPPER VOLTA | Ratification | 30/06/1970 | |
| URUGUAY | Ratification | 18/03/1954 | |
| VIETNAM | Ratification | 06/06/1953 | |
| YUGOSLAVIA | Ratification | 26/03/1953 | |