| Country | Action | Action Date | Effective Date |
|---|
| Antilles | Extension | 01/01/1986 | |
| ARGENTINA | Accession | 19/04/1961 | |
| Aruba | Extension | 01/01/1986 | |
| BELGIUM | Signature | 24/06/1934 | |
| BELGIUM | Ratification | 08/01/1936 | |
| BRAZIL | Signature | 24/05/1934 | |
| BRAZIL | Ratification | 08/01/1936 | |
| CHILE | Signature | 24/05/1934 | |
| CHILE | Ratification | 08/01/1936 | |
| CONGO | Accession | 07/07/1967 | |
| Curacao | Extension | 08/07/1936 | |
| CYPRUS | Accession | 19/07/1988 | 19/07/1989 |
| DENMARK | Signature | 24/05/1934 | |
| DENMARK | Ratification | 16/11/1950 | |
| East Indies | Extension | 08/07/1936 | |
| ESTONIA | Ratification | 08/01/1936 | |
| ESTONIA | Signature | 24/05/1936 | |
| FRANCE | Signature | 24/05/1934 | |
| FRANCE | Ratification | 27/07/1955 | |
| GERMANY | Signature | 24/05/1934 | |
| GERMANY | Ratification | 27/06/1936 | |
| GERMANY FEDERAL REPUBLIC | Re-Application | 01/11/1953 | |
| GREECE | Accession | 19/05/1951 | |
| Guernsey, Bailiwick of | Extension | 19/11/1987 | |
| HUNGARY | Signature | 24/05/1934 | |
| HUNGARY | Ratification | 08/01/1936 | |
| Isle of Man | Extension | 19/11/1987 | |
| ITALY | Signature | 24/01/1934 | |
| ITALY | Ratification | 27/01/1937 | |
| Jersey, Bailiwick of | Extension | 19/11/1987 | |
| LUXEMBOURG | Accession | 18/02/1991 | 18/08/1991 |
| MEXICO | Signature | 24/05/1934 | |
| NETHERLANDS THE | Signature | 24/05/1934 | |
| NETHERLANDS THE | Ratification | 08/07/1936 | |
| NETHERLANDS THE | Declaration | 01/01/1986 | |
| NORWAY | Signature | 24/05/1934 | |
| NORWAY | Ratification | 25/04/1939 | |
| NORWAY | Declaration | 25/04/1939 | |
| POLAND | Signature | 24/05/1934 | |
| POLAND | Ratification | 08/01/1936 | |
| POLAND | Withdrawal | 17/03/1952 | |
| POLAND | Re-Accession | 16/07/1976 | |
| PORTUGAL | Signature | 24/05/1934 | |
| PORTUGAL | Ratification | 27/06/1938 | |
| ROUMANIA | Signature | 24/05/1934 | |
| ROUMANIA | Ratification | 04/08/1937 | |
| ROUMANIA | Withdrawal | 21/09/1959 | |
| SPAIN | Signature | 24/05/1934 | |
| Surinam | Extension | 08/07/1936 | |
| SWEDEN | Signature | 24/05/1934 | |
| SWEDEN | Ratification | 01/07/1938 | |
| SWEDEN | Declaration | 01/07/1938 | |
| SWITZERLAND | Accession | 28/05/1954 | |
| SYRIA | Succession | 01/01/1905 | |
| TURKEY | Accession | 04/07/1956 | |
| UNITED ARAB REPUBLIC | Accession | 17/02/1960 | |
| UNITED KINGDOM | Declaration | 03/01/1979 | |
| UNITED KINGDOM | Accession | 03/07/1979 | 03/01/1980 |
| UNITED KINGDOM | Declaration | 19/11/1987 | |
| URUGUAY | Accession | 13/09/1970 | |
| YUGOSLAVIA | Signature | 24/05/1934 | |