| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| CUBA | Signature | 17/04/1930 | |
| CUBA | Ratification | 12/11/1931 | |
| Malay States, Federated | Extension | 26/03/1935 | |
| Malay States, Unfederated | Extension | 26/03/1935 | |
| UNITED KINGDOM | Signature | 17/04/1930 | |
| UNITED KINGDOM | Ratification | 12/11/1931 |