| YEAR | DATE | EVENT | PRIME MINISTER | COMMISIONER |
| 1900 | 20 april | UK protectorate | ||
| 1901 | 11 june | New Zealand colony | Stephenson Percy Smith | |
| 1902 | Christopher Freke Maxwell | |||
| 1907 | Henry Greyshott Cornwall | |||
| 1918 | Guy Norman Morris (I) | |||
| 1920 | John Crouchley Murray Enson | |||
| 1922 | Guy Norman Morris (II) | |||
| 1926 | Albert Arthur Luckham | |||
| 1931 | William Moody Bell | |||
| 1942 | Joseph Patrick McMahon-Box | |||
| 1943 | Cecil Hector Watson Larsen | |||
| 1953 | 17 august | Jock Malcolm McEwen | ||
| 1956 | Albert Oliver Dare | |||
| 1958 | David Walter Reginald Heatley | |||
| 1962 | Lyle Allen Shanks | |||
| 1968 | Selwyn Digby Wilson | |||
| 1973 | C.A. Robert |