New Zealand: Polity Style: 1907-2026

26 Sep 1907	the designation of New Zealand is changed from the Colony of New Zealand to the Dominion of New Zealand on 26 Sep 1907, the date appointed by a proclamation issued by command of the King of the United Kingdom of Great Britain and Ireland on 9 Sep 1907 (New Zealand Gazette, Extra, No. 84, 26 Sep 1907, p. 2901)
26 Sep 1907 - 31 Dec 1986	Dominion of New Zealand : New Zealand [1]
25 Nov 1947	the legislative independence of New Zealand from the United Kingdom is achieved upon the adoption of provisions of the Statute of Westminster, 1931, in accordance with the Statute of Westminster Adoption Act, 1947 (passed by the House of Representatives and by the Legislative Council of New Zealand on 18 Nov 1947 and 21 Nov 1947 respectively; received Royal Assent on 25 Nov 1947) (Statutes of New Zealand, 1947, 347-351) [2]
1 Nov 1983	New Zealand is defined as the Realm of New Zealand, comprising New Zealand, the self-governing state of the Cook Islands, the self-governing states of Niue, Tokelau, and the Ross Dependency, in accordance with letters patent constituting the Office of Governor-General of New Zealand, issued by command of the Queen of New Zealand on 28 Oct 1983, effective on the appointed date, 1 Nov 1983 (New Zealand Gazette, Supplement to the issue of 27 Oct 1983, 31 Oct 1983, pp. 1209-1215)
1 Jan 1987	the Constitution Act 1986, referring to the polity as New Zealand, is passed by the House of Representatives of New Zealand on 3 Dec 1986, received royal assent on 13 Dec 1986, came into operation on 1 Jan 1987, the date prescribed by Art. 1 (2) of the said act (New Zealand Statutes, 1986, 2:984-1000) [3]
1 Jan 1987 -	New Zealand [4]

"Dominion" was never formally excluded from the polity style, but it was limited in use since 1946. The word "dominion" was not included in the Royal Style proclaimed on 29 May 1953, but remained in use in some judicial documents up to 1987.
Full title: An Act to adopt certain Sections of the Statute of Westminster, 1931. Ceased to be a part of the law of New Zealand on 1 Jan 1987.
Full title: An Act to reform the constitutional law of New Zealand, to bring together into one enactment certain provisions of constitutional significance, and to provide that the New Zealand Constitution Act 1852 of the Parliament of the United Kingdom shall cease to have effect as part of the law of New Zealand.
Also in official use (Māori, from 1 Aug 1987): Aotearoa (not defined in statutory legislation).