§ Original Signatories.
- Great Britain and Northern Ireland (British Empire).
- Australia.
- Canada.
- India.
- Irish Free State.
- New Zealand.
- South Africa.
- Belgium.
- Czechoslovakia.
- France. Germany.
- Italy.
- Japan.
- Poland.
- United States of America.
| Accessions. | |
| Abyssinia. | Latvia. |
| Afghanistan. | Liberia. |
| Albania. | Lithuania. |
| Austria. | Luxemburg. |
| Bulgaria. | Mexico. |
| Chile. | Netherlands. |
| China. | Nicaragua. |
| Costa Rica. | Norway. |
| Cuba. | Panama. |
| Danzig. | Paraguay. |
| Denmark. | Persia. |
| Dominican Republic. | Peru. |
| Portugal. | |
| Egypt. | Rumania. |
| Estonia. | Siam. |
| Finland. | Soviet Union. |
| Greece. | Spain. |
| Guatemala. | Sweden. |
| Hayti. | Switzerland. |
| Honduras. | Turkey. |
| Hungary. | Venezuela. |
| Iceland. | Yugoslavia. |