| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| FRANCE | Signature | 20/05/1926 | |
| IRAQ | Signature | 20/05/1926 | |
| IRAQ | Accession | 02/05/1927 | |
| Palestine | Signature | 20/05/1926 | |
| Palestine | Accession | 18/07/1927 | |
| SYRIA | Signature | 20/05/1926 | |
| SYRIA | Accession | 09/07/1927 | |
| Transjordan | Statement | 20/05/1926 | |
| Transjordan | Accession | 18/08/1927 | |
| TURKEY | Signature | 20/05/1926 | |
| TURKEY | Ratification | 21/07/1926 | |
| UNITED KINGDOM |