| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| Anguilla | |||
| Bermuda | Accession | 17/04/1928 | |
| British Virgin Islands | |||
| Cyprus | Accession | 17/04/1928 | |
| Falkland Islands | Accession | 17/04/1928 | |
| HUNGARY | |||
| Montserrat | |||
| St Helena | Accession | 17/04/1928 | |
| UNITED KINGDOM | Signature | 23/07/1926 | |
| UNITED KINGDOM | Ratification | 01/12/1926 |