| 30 Jan 1840 | part of New South Wales (see Australian states) | Leaders | |
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| 3 May 1841 | separate British colony | Leaders | |
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| 26 Sep 1907 | Dominion of New Zealand | Leaders | |
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| 11 Dec 1931 | Statute of Westminster (ratified by New Zealand 25 Nov 1947) grants full sovereignty to the British dominions | Leaders | |
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| af.1950 | official use of the term "Dominion" is gradually abandoned | Leaders | |
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| 3 May 1841 - 10 Sep 1842 | William Hobson | Governors | |
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| 10 Sep 1842 - 26 Dec 1843 | Willoughby J. Shortland (acting) | Governors | |
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| 26 Dec 1843 - 18 Nov 1845 | Robert FitzRoy | Governors | |
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| 18 Nov 1845 - 31 Dec 1853 | George Grey (1st time) | Governors | |
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| 3 Jan 1854 - 6 Sep 1855 | Robert Henry Wynyard (1st time) | Governors | |
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| 6 Sep 1855 - 3 Oct 1861 | Thomas Gore Browne | Governors | |
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| 3 Oct 1861 - Dec 1861 | Robert Henry Wynyard (2nd time) | Governors | |
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| Dec 1861 - 5 Feb 1868 | Sir George Grey (2nd time) | Governors | |
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| 5 Feb 1868 - 19 Mar 1873 | Sir George Ferguson Bowen | Governors | |
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| 21 Mar 1873 - 14 Jun 1873 | Sir George Alfred Arney (acting) | Governors | |
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| 14 Jun 1873 - 3 Dec 1874 | Sir James Fergusson | Governors | |
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| 3 Dec 1874 - 21 Feb 1879 | George Augustus Constantine Phipps, Marquess of Normanby (b. 1819 - d. 1890) | Governors | |
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| 21 Feb 1879 - 27 Mar 1879 | James Prendergast (1st time) | Governors | |
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| 27 Mar 1879 - 9 Sep 1880 | Sir Hercules Robinson | Governors | |
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| 9 Sep 1880 - 29 Nov 1880 | James Prendergast (2nd time) | Governors | |
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| 29 Nov 1880 - 24 Jun 1882 | Sir Arthur Hamilton Gordon | Governors | |
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| 24 Jun 1882 - 20 Jan 1883 | James Prendergast (3rd time) | Governors | |
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| 20 Jan 1883 - 23 Mar 1889 | Sir William Jervois | Governors | |
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| 23 Mar 1889 - 2 May 1889 | James Prendergast (4th time) | Governors | |
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| 2 May 1889 - 25 Feb 1892 | William Hillier, Earl of Onslow | Governors | |
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| 25 Feb 1892 - 6 Jun 1892 | James Prendergast (5th time) | Governors | |
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| 7 Jun 1892 - 8 Feb 1897 | David Boyle, Earl of Glasgow | Governors | |
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| 8 Feb 1897 - 9 Aug 1897 | James Prendergast (6th time) | Governors | |
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| 10 Aug 1897 - 20 Jun 1904 | Uchter John Mark Knox, Earl of Ranfurly (b. 1856 - d. 1933) | Governors | |
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| 20 Jun 1904 - 8 Jun 1910 | William Lee Plunket, Baron Plunket (b. 1864 - d. 1920) | Governors | |
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| 8 Jun 1910 - 22 Jun 1910 | Sir Robert Stout (1st time) | Governors | |
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| 22 Jun 1910 - 3 Dec 1912 | John Poynder Dickson-Poynder, Baron Islington (b. 1866 - d. 1936) | Governors | |
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| 3 Dec 1912 - 19 Dec 1912 | Sir Robert Stout (2nd time) | Governors | |
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| 19 Dec 1912 - 28 Jun 1917 | Arthur William de Brito Savile Foljambe, Earl of Liverpool (b. 1870 - d. 1941) | Governors | |
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| 28 Jun 1917 - 8 Jul 1920 | Arthur William de Brito Savile Foljambe, Earl of Liverpool (s.a.) | Governors-general (representing the British monarch as head of state) | |
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| 8 Jul 1920 - 27 Sep 1920 | Sir Robert Stout (acting) | Governors-general (representing the British monarch as head of state) | |
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| 27 Sep 1920 - 13 Dec 1924 | John Rushworth, Viscount Jellicoe of Scapa (b. 1859 - d. 1935) | Governors-general (representing the British monarch as head of state) | |
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| 13 Dec 1924 - 8 Feb 1930 | Sir Charles Fergusson | Governors-general (representing the British monarch as head of state) | |
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| 8 Feb 1930 - 19 Mar 1930 | Sir Michael Myers (1st time) | Governors-general (representing the British monarch as head of state) | |
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| 19 Mar 1930 - 15 Mar 1935 | Charles Bathurst, Baron Bledisloe of Lydney (b. 1867 - d. 1958) | Governors-general (representing the British monarch as head of state) | |
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| 15 Mar 1935 - 12 Apr 1935 | Sir Michael Myers (2nd time) | Governors-general (representing the British monarch as head of state) | |
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| 12 Apr 1935 - 3 Feb 1941 | George Monckton-Arundell, Viscount Galway (b. 1882 - d. 1943) | Governors-general (representing the British monarch as head of state) | |
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| 3 Feb 1941 - 22 Feb 1941 | Sir Michael Myers (3rd time) | Governors-general (representing the British monarch as head of state) | |
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| 22 Feb 1941 - 19 Apr 1946 | Cyril Newall, Baron Newall | Governors-general (representing the British monarch as head of state) | |
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| 19 Apr 1946 - 17 Jun 1946 | Sir Michael Myers (4th time) | Governors-general (representing the British monarch as head of state) | |
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| 17 Jun 1946 - 15 Aug 1952 | Sir Bernard Cyril Freyberg (from 1951, Bernard Cyril Freyberg, Baron Freyberg of Wellington) (b. 1889 - d. 1963) | Governors-general (representing the British monarch as head of state) | |
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| 15 Aug 1952 - 2 Dec 1952 | Sir Humphrey Francis O'Leary | Governors-general (representing the British monarch as head of state) | |
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| 2 Dec 1952 - 25 Jul 1957 | Sir Willoughby Norrie (from 1957, Willoughby Norrie, Baron Norrie) (b. 1893 - d. 1977) | Governors-general (representing the British monarch as head of state) | |
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| 25 Jul 1957 - 5 Sep 1957 | Sir Harold Eric Barrowclough | Governors-general (representing the British monarch as head of state) | |
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| 5 Sep 1957 - 13 Sep 1962 | Charles John Lyttleton, Viscount Cobham (b. 1909 - d. 1977) | Governors-general (representing the British monarch as head of state) | |
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| 13 Sep 1962 - 9 Nov 1962 | Sir Harold Eric Barrowclough | Governors-general (representing the British monarch as head of state) | |
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| 9 Nov 1962 - 20 Oct 1967 | Sir Bernard Fergusson | Governors-general (representing the British monarch as head of state) | |
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| 20 Oct 1967 - 1 Dec 1967 | Sir Richard Wild (1st time) | Governors-general (representing the British monarch as head of state) | |
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| 1 Dec 1967 - 7 Sep 1972 | Sir Arthur Porritt | Governors-general (representing the British monarch as head of state) | |
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| 7 Sep 1972 - 27 Sep 1972 | Sir Richard Wild (2nd time) | Governors-general (representing the British monarch as head of state) | |
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| 27 Sep 1972 - 5 Oct 1977 | Sir Denis Blundell | Governors-general (representing the British monarch as head of state) | |
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| 5 Oct 1977 - 26 Oct 1977 | Sir Richard Wild (3rd time) | Governors-general (representing the British monarch as head of state) | |
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| 26 Oct 1977 - 25 Oct 1980 | Sir Keith Jacka Holyoake | Governors-general (representing the British monarch as head of state) | |
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| 25 Oct 1980 - 6 Nov 1980 | Sir Ronald Davidson (acting) | Governors-general (representing the British monarch as head of state) | |
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| 6 Nov 1980 - 22 Nov 1985 | Sir David Stuart Beattie | Governors-general (representing the British monarch as head of state) | |
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| 22 Nov 1985 - 20 Nov 1990 | Sir Paul Reeves | Governors-general (representing the British monarch as head of state) | |
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| 20 Nov 1990 - 21 Mar 1996 | Dame Catherine Tizard (f) | Governors-general (representing the British monarch as head of state) | |
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| 21 Mar 1996 - 21 Mar 2001 | Sir Michael Hardie Boys | Governors-general (representing the British monarch as head of state) | |
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| 22 Mar 2001 - 4 Apr 2001 | Dame Sian Elias (f) (1st time) | Governors-general (representing the British monarch as head of state) | |
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| 4 Apr 2001 - 4 Aug 2006 | Dame Silvia Cartwright (f) | Governors-general (representing the British monarch as head of state) | |
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| 4 Aug 2006 - 23 Aug 2006 | Dame Sian Elias (f) (2nd time) | Governors-general (representing the British monarch as head of state) | |
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| 23 Aug 2006 - | Anand Satyanand | Governors-general (representing the British monarch as head of state) | |
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| 7 May 1856 - 20 May 1856 | Henry Sewell | Prime ministers¹ | |
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| 20 May 1856 - 2 Jun 1856 | William Fox (1st time) | Prime ministers¹ | |
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| 2 Jun 1856 - 12 Jul 1861 | Edward William Stafford (1st time) | Prime ministers¹ | |
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| 12 Jul 1861 - 6 Aug 1862 | William Fox (2nd time) | Prime ministers¹ | |
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| 6 Aug 1862 - 30 Oct 1863 | Alfred Domett | Prime ministers¹ | |
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| 30 Oct 1863 - 24 Nov 1864 | Frederick Whitaker (1st time) | Prime ministers¹ | |
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| 24 Nov 1864 - 16 Oct 1865 | Frederick Aloysius Weld | Prime ministers¹ | |
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| 16 Oct 1865 - 28 Jun 1869 | Edward William Stafford (2nd time) | Prime ministers¹ | |
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| 28 Jun 1869 - 10 Sep 1872 | William Fox (3rd time) | Prime ministers¹ | |
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| 10 Sep 1872 - 11 Oct 1872 | Edward William Stafford (3rd time) | Prime ministers¹ | |
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| 11 Oct 1872 - 3 Mar 1873 | George Marsden Waterhouse | Prime ministers¹ | |
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| 3 Mar 1873 - 8 Apr 1873 | William Fox (4th time) | Prime ministers¹ | |
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| 8 Apr 1873 - 6 Jul 1875 | Julius Vogel (from 1875, Sir Julius Vogel) (1st time) (b. 1835 - d. 1899) | Prime ministers¹ | |
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| 6 Jul 1875 - 15 Feb 1876 | Daniel Pollen | Prime ministers¹ | |
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| 15 Feb 1876 - 1 Sep 1876 | Sir Julius Vogel (2nd time) | Prime ministers¹ | |
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| 1 Sep 1876 - 13 Oct 1877 | Harry Atkinson (1st time) | Prime ministers¹ | |
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| 13 Oct 1877 - 8 Oct 1879 | Sir George Grey | Prime ministers¹ | |
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| 8 Oct 1879 - 21 Apr 1882 | John Hall | Prime ministers¹ | |
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| 21 Apr 1882 - 25 Sep 1883 | Frederick Whitaker (2nd time) | Prime ministers¹ | |
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| 25 Sep 1883 - 16 Aug 1884 | Harry Atkinson (2nd time) | Prime ministers¹ | |
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| 16 Aug 1884 - 28 Aug 1884 | Robert Stout (1st time) | Prime ministers¹ | |
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| 28 Aug 1884 - 3 Sep 1884 | Harry Atkinson (3rd time) | Prime ministers¹ | |
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| 3 Sep 1884 - 8 Oct 1887 | Robert Stout (from 1886, Sir Robert Stout) (2nd time) (s.a.) | Prime ministers¹ | |
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| 8 Oct 1887 - 24 Jan 1891 | Harry Atkinson (from 1888, Sir Harry Atkinson) (4th time) (s.a.) | Prime ministers¹ | |
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| 24 Jan 1891 - 27 Apr 1893 | John Ballance | Prime ministers¹ | Lib |
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| 1 May 1893 - 10 Jun 1906 | Richard John Seddon | Prime ministers¹ | Lib |
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| 21 Jun 1906 - 6 Aug 1906 | William Hall-Jones (acting) | Prime ministers¹ | Lib |
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| 6 Aug 1906 - 28 Mar 1912 | Joseph Ward (from 1911, Sir Joseph Ward) (1st time) Lib (b. 1856 - d. 1930) | Prime ministers¹ | |
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| 28 Mar 1912 - 10 Jul 1912 | Thomas Mackenzie | Prime ministers¹ | Lib |
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| 10 Jul 1912 - 10 May 1925 | William Ferguson Massey | Prime ministers¹ | Ref |
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| 14 May 1925 - 30 May 1925 | Sir Francis Henry Dillon Bell Ref | Prime ministers¹ | |
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| 30 May 1925 - 10 Dec 1928 | Joseph Gordon Coates | Prime ministers¹ | Ref |
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| 10 Dec 1928 - 28 May 1930 | Sir Joseph Ward (2nd time) | Prime ministers¹ | Uni |
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| 28 May 1930 - 5 Dec 1935 | George William Forbes | Prime ministers¹ | Uni |
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| 5 Dec 1935 - 27 Mar 1940 | Michael Joseph Savage | Prime ministers¹ | Lab |
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| 27 Mar 1940 - 13 Dec 1949 | Peter Fraser | Prime ministers¹ | Lab |
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| 13 Dec 1949 - 20 Sep 1957 | Sidney Holland | Prime ministers¹ | Nat |
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| 20 Sep 1957 - 12 Dec 1957 | Keith Jacka Holyoake | Prime ministers¹ | |
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| 12 Dec 1957 - 26 Nov 1960 | Walter Nash | Prime ministers¹ | Lab |
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| 26 Nov 1960 - 7 Feb 1972 | Keith Jacka Holyoake (from 1970, Sir Keith Jacka Holyoake) (2nd time) Nat (s.a.) | Prime ministers¹ | |
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| 7 Feb 1972 - 8 Dec 1972 | John Ross Marshall | Prime ministers¹ | Nat |
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| 8 Dec 1972 - 31 Aug 1974 | Norman Eric Kirk | Prime ministers¹ | Lab |
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| 1 Sep 1974 - 6 Sep 1974 | Hugh Watt (acting) | Prime ministers¹ | Lab |
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| 6 Sep 1974 - 12 Dec 1975 | Wallace Edward Rowling | Prime ministers¹ | Lab |
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| 12 Dec 1975 - 26 Jul 1984 | Robert David Muldoon (from 1984, Sir Robert David Muldoon) Nat (b. 1921 - d. 1992) | Prime ministers¹ | |
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| 26 Jul 1984 - 8 Aug 1989 | David Lange | Prime ministers¹ | Lab |
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| 8 Aug 1989 - 4 Sep 1990 | Geoffrey Palmer | Prime ministers¹ | Lab |
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| 4 Sep 1990 - 2 Nov 1990 | Mike Moore | Prime ministers¹ | Lab |
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| 2 Nov 1990 - 8 Dec 1997 | Jim Bolger | Prime ministers¹ | Nat |
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| 8 Dec 1997 - 10 Dec 1999 | Jenny Shipley (f) | Prime ministers¹ | Nat |
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| 10 Dec 1999 - | Helen Clark (f) | Prime ministers¹ | Lab |
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