| Country | Action | Action Date | Effective Date |
|---|---|---|---|
| British Honduras | Extension | 21/02/1879 | |
| British North Borneo | Extension | 01/02/1891 | |
| Falkland Islands | Extension | 21/02/1879 | |
| Leeward Islands | Extension | 25/04/1879 | |
| UNITED KINGDOM | Signature | 01/06/1878 | |
| UNITED KINGDOM | Ratification | 27/03/1879 |