The Cabinet Secretary of New Zealand chaired a working group to discuss the best way of accomplishing the reforms in all the Commonwealth realms. The realms agreed that the United Kingdom would be the first to draft legislation, but that it would not be introduced without the agreement of the other realms and would not be commenced until the appropriate domestic arrangements were in place in the other realms. While some realms deferred to the British legislation, a number of the other realms passed their own laws effecting the changes in succession.
Australia The English
Bill of Rights 1689 and
Act of Settlement 1701 are, and the
Royal Marriages Act 1772 was, incorporated into Australian law, and the Act of Settlement is part of the laws of the Australian states and territories, and therefore not only Australia but also its states had to change their laws. At a meeting of the
Council of Australian Governments (COAG) in mid-December 2012, the then prime minister,
Julia Gillard, and the premiers of five states agreed each state legislature would pass a law permitting the federal parliament to alter the line of succession for the Commonwealth and all the states. However,
Queensland Premier Campbell Newman disagreed, citing Section 7 of the
Australia Act 1986 and concluding from it that each state is sovereign and each should therefore pass its own legislation affecting the succession laws in its jurisdiction. Accordingly, the Queensland state government introduced its own Succession to the Crown Bill in the
Legislative Assembly of Queensland on 13 February 2013. The federal government stated that if Queensland were to proceed, it would override the state's legislation in favour of national legislation. Following an agreement at a COAG meeting in April 2013, Queensland on 2 May amended its bill to add permission for the Commonwealth to act and the bill passed the same day. In November 2014, during a debate on the Succession to the Crown Bill in Western Australia, when the then
Premier Colin Barnett was asked why Western Australia was taking so long to proceed with the necessary legislation, he replied: "I concede that it has taken a while, but there has been no particular reason for that. Western Australia had an election, and I guess that slowed things down a little bit, and in a practical sense, given that the immediacy had gone out of the matter and given that the next three people in line to the monarchy are males, it did not arise." In February 2015 the Attorney-General, Michael Mischin, acknowledged "it is significantly overdue but that is just one of the facts of life". Western Australia finally passed its legislation on 3 March 2015. The
Australian parliament passed the Succession to the Crown Act on 19 March 2015 and
royal assent was granted on 24 March 2015. The change to the succession law in the United Kingdom finally came into effect on 26 March 2015. The
Northern Territory government introduced a bill to request the federal parliament to change the law relating to royal succession in similar terms. On second reading it was explained that the Northern Territory's request or consent to the federal parliament enactment was not constitutionally necessary but that the government of the Northern Territory considered it desirable that arrangements in the Northern Territory would mirror those between the Australian Commonwealth and its states.
Canada The Act of Settlement 1701, the Bill of Rights 1689, and
His Majesty's Declaration of Abdication Act 1936 are part of the laws of Canada. The Canadian government's
Succession to the Throne Act, 2013, with the long title
An Act to assent to alterations in the law touching the Succession to the Throne, 2013, was tabled in the
House of Commons of Canada as Bill C-53 on 31 January 2013 and passed by that body on 4 February. It was then approved by the
Senate on 26 March 2013 and received royal assent on the following day. It came into force on 26 March 2015. (later, after amendment, to be given royal assent there on 25 April 2013 as the Succession to the Crown Act 2013). The position taken by the
federal Cabinet was that Canada has no royal succession laws, the
country's monarch being automatically whoever is monarch of the United Kingdom, and the Canadian parliament need only assent to the changes made to the laws of succession in the United Kingdom by that realm's parliament, which can be achieved by ordinary legislation, without the approval of
the provinces. There was disagreement over this process, mainly on whether the rules of succession involved the office of the Queen, thus requiring a constitutional amendment under Section 41(a) of the
Constitution Act, 1982; whether, by the principle of either received law, by statute law, or both, the Bill of Rights 1689, the Act of Settlement, and the
conventions related to royal succession were a part of the Canadian constitution; and whether the Canadian law assented to the Succession to the Crown Bill 2012 as had been presented to the United Kingdom parliament or as amended by that body and passed into law.
Judicial review There was some speculation in the press before the birth of
Prince George of Cambridge about Canada having a different line of succession to the other realms if the Canadian law were eventually found to be unconstitutional. An application was made to the
Ontario Superior Court of Justice seeking to find the Succession to the Throne Act, 2013, unconstitutional due to allegedly contravening both section 2 of the Canada Act 1982 and section 15 of the Charter of Rights and Freedoms. The charter challenge was dismissed as non-justiciable in August 2013. The validity of the Canadian parliament's legislation came under
judicial review in the
Quebec Superior Court over, among other matters, its alleged failure to "follow the amending procedure" set out in section 41 of the Constitution Act, 1982. The attorney-general of Quebec joined as an intervener in support of the challenge. The court hearing began on 1 June 2015. On 16 February 2016, the court ruled Canada "did not have to change its laws nor its Constitution for the British royal succession rules to be amended and effective". The ruling was appealed by the plaintiffs and was heard by the
Quebec Court of Appeal in February 2018. The court released its decision upholding the lower court judgement on 28 October 2019. In December 2019, the appellants filed an application with the
Supreme Court of Canada seeking
leave to appeal the Quebec Court of Appeal's decision. In April 2020, the Supreme Court declined to grant leave to appeal, bringing the matter to an end.
New Zealand The Bill of Rights 1688 and Act of Settlement 1701 are, and The Royal Marriages Act 1772 was, part of the laws of New Zealand. The Royal Succession Bill which led to the government's decision to observe normal legislative time limits in the House of Lords. The act received
royal assent on 25 April 2013, passing into law, but its provisions altering the law of succession would not come into force until a time to be formally appointed by the
Lord President of the Council (another office held by Clegg). When publishing the proposed legislation the government had announced that it was expecting to bring the provisions into force at the same time as the other realms would be bringing into force any changes to their legislation or other changes necessary for them to implement the Perth Agreement.
Caribbean realms According to
the Lord Wallace of Tankerness, who sponsored the British government's
Succession to the Crown Bill in the
House of Lords, the governments of Jamaica and Belize had outlined that neither country would require domestic legislation to give effect to changes to the lines of succession to their thrones, as those lines were left by Belize's and Jamaica's constitutions to law of the United Kingdom. Wallace said on 13 March 2013 that the British government expected that the parliaments of Jamaica and Belize would not be consulted further by their governments. Of Antigua and Barbuda, Barbados, the Bahamas, Grenada, Saint Lucia, Saint Vincent and the Grenadines, and Saint Kitts and Nevis, it was also said by Lord Wallace of Tankerness: "We believe that it would be open to the other Caribbean realms to take a similar view [as Jamaica and Belize], but it is, of course, for them to decide how best to give the changes effect."
Other Pacific realms On 13 March 2013, Lord Wallace of Tankerness said that the countries of Papua New Guinea, Tuvalu, and the Solomon Islands would not require amendments to their constitutions while Tuvalu's constitution states that "[t]he provisions of this Constitution referring to the Sovereign extend, in accordance with section 13 (references to the Sovereign of Tuvalu) of Schedule 1, to the Heirs and Successors of the Sovereign according to law" and a reference to the sovereign of Tuvalu "shall be read as including a reference to (a) the Sovereign of the United Kingdom; or (b) any person exercising the whole or the relevant part of the sovereignty of the United Kingdom, as the case requires, in accordance with the law in force in England."
Changes effected The prime ministers' commitment to bring forward measures for the changes to be effective simultaneously was accomplished on 26 March 2015 by orders commencing the legislation passed in seven of the realms: Australia, Barbados, Canada, New Zealand, St Kitts and Nevis, St Vincent and the Grenadines, and the United Kingdom. The remaining realms (Antigua and Barbuda, Bahamas, Belize, Grenada, Jamaica, Papua New Guinea, St Lucia, Solomon Islands, and Tuvalu) concluded that legislation was not necessary. However in Canada the legislation was challenged in court (see
Judicial review above) and the matter remained pending until April 2020. ==Timetable==