| Country | Action | Action Date | Effective Date |
|---|
| AUSTRALIA | Signature | 20/01/1930 | |
| AUSTRALIA | Ratification | 21/07/1930 | |
| BELGIUM | Signature | 20/01/1930 | |
| BELGIUM | Ratification | 09/05/1930 | |
| CANADA | Signature | 20/01/1930 | |
| CANADA | Ratification | 12/07/1930 | |
| CZECHOSLOVAKIA | Signature | 20/01/1930 | |
| FRANCE | Signature | 20/01/1930 | |
| FRANCE | Ratification | 09/05/1930 | |
| GREECE | Signature | 20/01/1930 | |
| GREECE | Ratification | 25/06/1930 | |
| INDIA | Signature | 20/01/1930 | |
| INDIA | Ratification | 21/07/1930 | |
| ITALY | Signature | 20/01/1930 | |
| ITALY | Ratification | 09/05/1930 | |
| JAPAN | Signature | 20/01/1930 | |
| JAPAN | Ratification | 29/10/1931 | |
| NEW ZEALAND | Signature | 20/01/1930 | |
| NEW ZEALAND | Ratification | 21/07/1930 | |
| POLAND | Signature | 20/01/1930 | |
| POLAND | Ratification | 21/04/1931 | |
| PORTUGAL | Signature | 20/01/1930 | |
| PORTUGAL | Ratification | 11/07/1931 | |
| ROUMANIA | Signature | 20/01/1930 | |
| ROUMANIA | Ratification | 23/06/1930 | |
| SOUTH AFRICA | Signature | 20/01/1930 | |
| SOUTH AFRICA | Ratification | 26/07/1930 | |
| UNITED KINGDOM | Signature | 20/01/1930 | |
| UNITED KINGDOM | Ratification | 09/05/1930 | |
| YUGOSLAVIA | Signature | 20/01/1930 | |
| YUGOSLAVIA | Ratification | 31/05/1930 | |