| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Australia | Signature | 10/06/1930 | |
| Canada | Signature | 10/06/1930 | |
| FRANCE | Signature | 10/06/1930 | |
| GERMANY | Signature | 10/06/1930 | |
| India | Signature | 10/06/1930 | |
| ITALY | Signature | 10/06/1930 | |
| JAPAN | Signature | 10/06/1930 | |
| New Zealand | Signature | 10/06/1930 | |
| PORTUGAL | Signature | 10/06/1930 | |
| South Africa | Signature | 10/06/1930 | |
| UNITED KINGDOM | Signature | 10/06/1930 | |
| YUGOSLAVIA | Signature | 10/06/1930 |