| Country | Action | Action Date | Effective Date |
|---|
| BRITISH EMPIRE | Signature | 20/10/1921 | |
| BRITISH EMPIRE | Ratification | 06/04/1922 | |
| DENMARK | Signature | 20/10/1921 | |
| DENMARK | Ratification | 06/04/1922 | |
| ESTONIA | Signature | 20/10/1921 | |
| ESTONIA | Ratification | 03/04/1923 | |
| ESTONIA | Declaration | 21/06/1992 | |
| FINLAND | Signature | 20/10/1921 | |
| FINLAND | Ratification | 06/04/1922 | |
| FRANCE | Signature | 20/10/1921 | |
| FRANCE | Ratification | 06/04/1922 | |
| GERMANY FEDERAL REPUBLIC | Signature | 20/10/1921 | |
| GERMANY FEDERAL REPUBLIC | Ratification | 06/04/1922 | |
| GERMANY FEDERAL REPUBLIC | Declaration | 01/01/1953 | |
| ITALY | Signature | 20/10/1921 | |
| ITALY | Ratification | 11/05/1922 | |
| LATVIA | Signature | 20/10/1921 | |
| LATVIA | Ratification | 09/09/1922 | |
| LATVIA | Declaration | 14/04/1992 | |
| POLAND | Signature | 20/10/1921 | |
| POLAND | Ratification | 29/06/1922 | |
| SWEDEN | Signature | 20/10/1921 | |
| SWEDEN | Ratification | 06/04/1922 | |
| UNITED KINGDOM | Signature | 20/10/1921 | |
| UNITED KINGDOM | Ratification | 06/04/1922 | |