Fourth Additional Protocol to the Constitution of the Universal Postal Union
In force| Type | postal |
|---|---|
| Signed | 14-Dec-1989 |
| In force | 01-Jan-1991 |
| Territorial extension | Cayman Islands |
| Subject | UNIVERSAL POSTAL UNION (UPU) |
| Type | postal |
|---|---|
| Signed | 14-Dec-1989 |
| In force | 01-Jan-1991 |
| Territorial extension | Cayman Islands |
| Subject | UNIVERSAL POSTAL UNION (UPU) |