| Country | Action | Action Date | Effective Date |
|---|
| BRAZIL | Signature | 24/09/1959 | |
| Cameroons | Signature | 01/01/1905 | |
| COLOMBIA | Signature | 24/09/1959 | |
| COSTA RICA | Signature | 24/09/1959 | |
| CUBA | Signature | 24/09/1959 | |
| DOMINICAN REPUBLIC | Signature | 24/09/1959 | |
| ECUADOR | Signature | 24/09/1959 | |
| ECUADOR | Ratification | 14/03/1961 | |
| FRANCE | Notification | 01/01/1905 | |
| French Cameroons | Signature | 01/01/1905 | |
| GUATEMALA | Signature | 24/09/1959 | |
| HAITI | Signature | 24/09/1959 | |
| HONDURAS | Signature | 24/09/1959 | |
| Kenya | Signature | 25/06/1959 | |
| Kenya | Ratification | 25/06/1962 | |
| MEXICO | Signature | 24/09/1959 | |
| NICARAGUA | Signature | 24/09/1959 | |
| PANAMA | Signature | 24/09/1959 | |
| PERU | Signature | 24/09/1959 | |
| PORTUGAL | Signature | 24/09/1959 | |
| SALVADOR | Signature | 24/09/1959 | |
| Tanganyika | Signature | 25/06/1959 | |
| Tanganyika | Ratification | 25/06/1962 | |
| Uganda | Signature | 25/06/1959 | |
| Uganda | Ratification | 25/06/1962 | |
| UNITED KINGDOM | Notification | 01/01/1905 | |
| UNITED KINGDOM | Notification | 24/09/1959 | |
| UNITED KINGDOM | Notification | 25/06/1962 | |
| VENEZUELA | Signature | 24/09/1959 | |