| Country | Action | Action Date | Effective Date |
|---|
| ALBANIA | Signature | 02/10/1930 | |
| AUSTRALIA | Signature | 02/10/1930 | |
| AUSTRIA | Signature | 02/10/1930 | |
| AUSTRIA | Reservation | 02/10/1930 | |
| BELGIUM | Signature | 02/10/1930 | |
| BOLIVIA | Signature | 02/10/1930 | |
| BULGARIA | Signature | 02/10/1930 | |
| CUBA | Signature | 02/10/1930 | |
| CZECHOSLOVAKIA | Signature | 02/10/1930 | |
| DENMARK | Signature | 02/10/1930 | |
| DENMARK | Ratification | 15/05/1931 | |
| ESTONIA | Signature | 02/10/1930 | |
| ETHIOPIA | Signature | 02/10/1930 | |
| FINLAND | Signature | 02/10/1930 | |
| FINLAND | Ratification | 30/07/1931 | |
| FRANCE | Signature | 02/10/1930 | |
| GERMANY | Signature | 02/10/1930 | |
| GREECE | Signature | 02/10/1930 | |
| Irish Free State | Signature | 02/10/1930 | |
| ITALY | Signature | 02/10/1930 | |
| LATVIA | Signature | 02/10/1930 | |
| LITHUANIA | Signature | 02/10/1930 | |
| NETHERLANDS THE | Signature | 02/10/1930 | |
| NORWAY | Signature | 02/10/1930 | |
| PERSIA | Signature | 02/10/1930 | |
| PERSIA | Ratification | 28/09/1932 | |
| PERU | Signature | 02/10/1930 | |
| POLAND | Signature | 02/10/1930 | |
| PORTUGAL | Signature | 02/10/1930 | |
| ROUMANIA | Signature | 02/10/1930 | |
| SPAIN | Signature | 02/10/1930 | |
| SWEDEN | Signature | 02/10/1930 | |
| SWEDEN | Reservation | 02/10/1930 | |
| UNITED KINGDOM | Signature | 02/10/1930 | |
| YUGOSLAVIA | Signature | 02/10/1930 | |