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| YEAR | DATE | EVENT | HEAD OF STATE | GOVERNOR |
| 1888 | UK protectorate | Makea Takau + Makea Tavake (III) | Richard Exham | |
| 1891 | 5 june | UK protectorate of Cook Islands Federation | Makea Takau | Frederick Joseph Moss |
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| YEAR | DATE | EVENT | HEAD OF STATE | GOVERNOR |
| 1893 | ||||
| 1898 | Walter Edward Gudgeon |
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| YEAR | DATE | EVENT | PRIME MINISTER | COMMISSIONER |
| 1901 | 11 june | New Zealand colony | Walter Edward Gudgeon | |
| 1909 | James Eman-Smith | |||
| 1913 | Henry William Northcroft | |||
| 1916 | Frederick William Platts | |||
| 1921 | John George Lewis Hewitt | |||
| 1922 | Hugh Fraser Ayson (I) | |||
| 1937 | Stephan John Smith | |||
| 1938 | Hugh Fraser Ayson (II) | |||
| 1943 | William Tailby | |||
| 1951 | Geoffrey Nevill | |||
| 1961 | Albert Oliver Dare |