| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| CZECHOSLOVAKIA | |||
| India | Accession | 31/01/1923 | |
| IRELAND, REPUBLIC OF | Accession | 02/01/1924 | |
| Malta | Accession | 31/01/1923 | |
| NEW ZEALAND | Accession | 02/01/1924 | |
| Newfoundland (UK) | Accession | 02/01/1924 | |
| SOUTH AFRICA | Accession | 02/01/1924 | |
| UNITED KINGDOM | Signature | 31/01/1923 | |
| UNITED KINGDOM | Ratification | 30/04/1923 |