| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| ALGERIA | Accession | 21/07/1964 | 21/10/1964 |
| ARGENTINA | Accession | 24/07/1985 | 22/10/1985 |
| AUSTRIA | Signature | 29/05/1933 | |
| BELGIUM | Signature | 29/05/1933 | |
| BELGIUM | Ratification | 14/10/1936 | |
| BRAZIL | Signature | 29/05/1933 | |
| BRAZIL | Ratification | 06/03/1939 | |
| CENTRAL AFRICAN REPUBLIC | Accession | 10/06/1969 | |
| CZECHOSLOVAKIA | Signature | 29/05/1933 | |
| DENMARK | Signature | 29/05/1933 | |
| DENMARK | Ratification | 31/01/1939 | |
| EGYPT | Accession | 07/06/1971 | 05/09/1971 |
| FINLAND | Accession | 30/10/1953 | |
| FRANCE | Signature | 29/05/1933 | |
| GERMAN DEMOCRATIC REPUBLIC | Re-Application | 31/01/1974 | 08/01/1958 |
| GERMANY | Signature | 29/05/1933 | |
| GERMANY | Ratification | 22/02/1935 | |
| GERMANY FEDERAL REPUBLIC | Re-Application | 01/05/1952 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 16/01/1976 | |
| GUATEMALA | Signature | 29/05/1933 | |
| GUATEMALA | Ratification | 06/07/1939 | |
| HAITI | Accession | 19/01/1961 | |
| HONDURAS | Signature | 12/10/1933 | |
| HUNGARY | Signature | 28/12/1933 | |
| HUNGARY | Ratification | 15/05/1937 | |
| India | Signature | 29/05/1933 | |
| ITALY | Signature | 29/05/1933 | |
| ITALY | Ratification | 28/09/1936 | |
| IVORY COAST | Accession | 11/09/1965 | |
| LEBANON | Accession | 16/05/1996 | 13/08/1996 |
| LITHUANIA | Signature | 29/05/1933 | |
| MALI | Accession | 20/12/1961 | |
| MAURITANIA | Accession | 26/07/1962 | 02/11/1962 |
| Morocco | Extension | 28/06/1934 | |
| NETHERLANDS THE | Signature | 30/12/1933 | |
| NETHERLANDS THE | Ratification | 28/01/1938 | |
| NIGER | Accession | 23/09/1964 | 07/01/1965 |
| NORWAY | Signature | 29/05/1933 | |
| NORWAY | Ratification | 22/06/1939 | |
| POLAND | Signature | 29/05/1933 | |
| POLAND | Ratification | 31/08/1937 | |
| ROUMANIA | Signature | 29/05/1933 | |
| ROUMANIA | Ratification | 23/05/1935 | |
| RWANDA | Succession | 01/12/1964 | |
| SALVADOR | Signature | 29/05/1933 | |
| SAN MARINO | Signature | 29/05/1933 | |
| SENEGAL | Accession | 01/09/1964 | 01/12/1964 |
| SPAIN | Signature | 29/05/1933 | |
| SPAIN | Ratification | 28/06/1934 | |
| SWEDEN | Accession | 31/01/1939 | |
| SWITZERLAND | Signature | 29/05/1933 | |
| SWITZERLAND | Ratification | 15/12/1949 | |
| TOGO | Accession | 03/07/1980 | 01/10/1980 |
| TUNISIA | Accession | 02/05/1966 | |
| TURKEY | Signature | 08/06/1933 | |
| UNITED KINGDOM | Signature | 29/05/1933 | |
| UNITED KINGDOM | Declaration | 29/05/1933 | |
| UNITED STATES OF AMERICA | Signature | 29/05/1933 | |
| UNITED STATES OF AMERICA | Declaration | 29/05/1933 | |
| YUGOSLAVIA | Signature | 09/08/1933 | |
| ZAIRE | Accession | 09/08/1962 | 07/11/1962 |