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| YEAR | DATE | EVENT | PRIME MINISTER |
| 1788 | British territory, part of New South Wales | ||
| 1914 | 1 july | Australia territory | |
| 1979 | 10 august | Self governing Australia territory | David Ernest Buffett (I) |
| 1986 | 21 may | John Terence Brown (I) | |
| 1989 | 22 may | David Ernest Buffett (II) | |
| 1992 | 20 may | John Terence Brown (II) | |
| 1994 | 4 may | Michael William King | |
| 1997 | 5 may | George Charles Smith | |
| 2000 | 28 february | Ronald Coane Nobbs | |
| 2001 | 5 december | Geoffrey Robert Gardner | |
| 2013 | 13 march | Lisle Snell |