| Country | Action | Action Date | Effective Date |
|---|
| AUSTRALIA | Accession | 08/07/1935 | |
| AUSTRIA | Signature | 12/04/1930 | |
| BELGIUM | Signature | 12/04/1930 | |
| BELGIUM | Ratification | 04/04/1939 | |
| BELGIUM | Reservation | 04/04/1939 | |
| BRAZIL | Accession | 19/09/1931 | |
| BURMA | Succession | 23/01/1940 | 10/01/1937 |
| CANADA | Signature | 12/04/1930 | |
| CHINA | Signature | 12/04/1930 | |
| CHINA | Ratification | 14/02/1935 | |
| CHINA | Withdrawal | 11/10/1973 | |
| COLOMBIA | Signature | 12/04/1930 | |
| CUBA | Signature | 12/04/1930 | |
| EGYPT | Signature | 12/04/1930 | |
| FIJI | Succession | 25/05/1973 | |
| GREECE | Signature | 12/04/1930 | |
| INDIA | Signature | 12/04/1930 | |
| INDIA | Ratification | 28/09/1932 | |
| INDIA | Declaration | 28/09/1932 | |
| IRELAND, REPUBLIC OF | Signature | 12/04/1930 | |
| LUXEMBOURG | Signature | 12/04/1930 | |
| MEXICO | Signature | 12/04/1930 | |
| PAKISTAN | Succession | 29/07/1953 | |
| PERU | Signature | 12/04/1930 | |
| PORTUGAL | Signature | 12/04/1930 | |
| SALVADOR | Signature | 12/04/1930 | |
| SALVADOR | Ratification | 14/10/1935 | |
| SALVADOR | Reservation | 14/10/1935 | |
| SOUTH AFRICA | Signature | 12/04/1930 | |
| SOUTH AFRICA | Ratification | 09/04/1936 | |
| SPAIN | Signature | 12/04/1930 | |
| UNITED KINGDOM | Signature | 12/04/1930 | |
| UNITED KINGDOM | Ratification | 14/01/1932 | |
| UNITED KINGDOM | Declaration | 14/01/1932 | |
| UNITED KINGDOM | Notification | 10/06/1997 | 01/07/1997 |
| URUGUAY | Signature | 12/04/1930 | |
| ZIMBABWE | Succession | 01/12/1998 | 18/04/1980 |