| Country | Action | Action Date | Effective Date |
|---|
| AUSTRIA | Accession | 03/02/1930 | 04/05/1930 |
| BELGIUM | Signature | 14/06/1929 | |
| BELGIUM | Ratification | 12/09/1929 | |
| DANZIG | Signature | 14/06/1929 | |
| FINLAND | Accession | 07/10/1929 | 07/01/1930 |
| FRANCE | Signature | 14/06/1929 | |
| FRANCE | Ratification | 12/09/1929 | |
| GERMANY | Accession | 12/05/1930 | 10/08/1930 |
| GREECE | Accession | 22/06/1931 | 20/09/1931 |
| HUNGARY | Signature | 14/06/1929 | |
| ITALY | Signature | 14/06/1929 | |
| ITALY | Ratification | 12/09/1929 | |
| NETHERLANDS THE | Accession | 03/07/1930 | 01/10/1930 |
| POLAND | Accession | 14/06/1929 | 23/03/1930 |
| ROUMANIA | Accession | 24/11/1929 | 24/02/1930 |
| SAAR TERRITORY | Signature | 14/06/1929 | |
| SAAR TERRITORY | Ratification | 12/09/1929 | |
| SPAIN | Accession | 17/12/1929 | 17/03/1930 |
| SWITZERLAND | Signature | 14/06/1929 | |
| UNITED KINGDOM | Signature | 14/06/1929 | |
| UNITED KINGDOM | Ratification | 12/09/1929 | |