The Act of Settlement 1701 was an Act of the Parliament of England that dictated the succession to the English and Irish crowns, limiting it to Protestants only. It specifically excluded anyone who was Catholic or married to a Catholic from inheriting the throne. This effectively bypassed other descendants of Charles I in favor of Sophia of Hanover, a Protestant granddaughter of James VI and I. Upon the death of Queen Anne, Sophia's son, George I, ascended to the throne, initiating the Hanoverian dynasty in Britain.
In 1900, the Commonwealth of Australia Constitution Act was passed. Clause 2 extends provisions referring to the Queen to Her Majesty's heirs and successors in the sovereignty of the United Kingdom.
In 1926, the requirement for ministers of the Crown to stand for a by-election to re-enter the House upon such appointment was removed. This change affected the provision that no person with an office under the monarch, or receiving a pension from the Crown, could be a Member of Parliament.
In 1931, the Statute of Westminster acknowledged that any changes to the rules of succession may be made only with the agreement of all of the states involved, with concurrent amendments to be made by each state's parliament or parliaments.
In 1931, the Statute of Westminster was enacted, establishing the convention that changes to the Act of Settlement and other succession laws require the agreement of all Commonwealth realms.
During the crisis of 1936, it was noted that the Australian constitution contains no power for the federal parliament to legislate with respect to the monarchy.
In December 1978, amid media speculation about Prince Charles marrying a Roman Catholic, Powell defended the Act of Settlement's provision excluding Roman Catholics from ascending the throne, citing political considerations and concerns about external authority.
In 1978, Prince Michael of Kent, who was fifteenth in line for the throne, was removed from the line of succession due to his marriage to Baroness Marie-Christine von Reibnitz, who is Roman Catholic.
In 1981, the British Nationality Act was enacted, it made naturalized citizens equal to those native born and excluded Commonwealth citizens from the definition of foreigners, and citizens of the Irish Republic from the definition of aliens, while retaining the original Act's provision against foreigners holding positions of power.
In 1988, George Windsor, Earl of St Andrews, married Sylvana Palma Tomaselli, who is Roman Catholic, making him ineligible to succeed the throne at the time.
In 1988, Lord St Andrews lost his place in the line of succession when he married the Roman Catholic Canadian Sylvana Palma Tomaselli.
In November 1995, Prince Charles reportedly told Tony Blair and Paddy Ashdown that he believed "Catholics should be able to ascend to the British throne."
In 1998, Canadian scholar Richard Toporoski theorized that if an alteration were made in the United Kingdom to the Act of Settlement 1701, the domestic constitutional law of Australia or Papua New Guinea would provide for the succession in those countries of the same person who became Sovereign of the United Kingdom.
In 1998, during debate on a Succession to the Crown Bill, Lord Williams of Mostyn informed the House of Lords that the Queen had "no objection to the Government's view that in determining the line of succession to the throne, daughters and sons should be treated in the same way."
In 1999, the Scottish Parliament unanimously passed a motion calling for the complete removal of any discrimination linked to the monarchy and the repeal of the Act of Settlement.
In 2002, Tony O'Donohue launched a court action in Canada, arguing that the Act of Settlement violated the Canadian Charter of Rights and Freedoms. The case was later dismissed.
In 2003, Adrian Hilton defended the Act of Settlement in The Spectator, arguing it was not irrational prejudice but a necessary protection against religious and civil liberty being lost under a Roman Catholic monarch due to the Pope's claimed universal jurisdiction.
In 2003, Lord Downpatrick, the son of George Windsor, Earl of St Andrews, converted to Roman Catholicism, making him the most senior descendant of Sophia to be barred from succession due to religion.
In December 2004, a private member's bill, the Succession to the Crown Bill, was introduced in the House of Lords. The Tony Blair government blocked attempts to revise succession laws.
On March 16, 2005, an appeal of the decision in Tony O'Donohue's court action against the Act of Settlement was dismissed.
In 2007, the announcement of the engagement of Peter Phillips to Autumn Kelly, a Roman Catholic, revived discussion about the Act of Settlement. Concerns were raised regarding Phillips' potential ineligibility to accede to the Canadian throne.
In 2008, Lady Marina Windsor, daughter of George Windsor, Earl of St Andrews, converted to Catholicism and was removed from the line of succession.
In January 2009, a private member's bill to amend the Act of Succession was introduced in parliament, raising the issue of ending the exclusion of Catholics from the throne and male-preference primogeniture.
In November 2010, the announcement of Prince William's upcoming marriage raised questions about the succession, particularly regarding the potential for a first-born daughter followed by a son, highlighting the Act's implications.
In October 2011, the Australian federal government reportedly reached an agreement with all of the states on potential changes to their laws in the wake of amendments to the Act of Settlement.
On 28 October 2011, at the Commonwealth Heads of Government Meeting, the prime ministers of the Commonwealth realms agreed to support proposed changes to the Act of Settlement put forward by Cameron.
In early 2011, Keith Vaz introduced a private member's bill to the House of Commons proposing amendments to the Act of Settlement, including removing provisions related to Roman Catholicism and changing primogeniture. He sought support from other Commonwealth countries.
In 2013, the Succession to the Crown Act 2013 removed the disqualification arising from marriage to a Roman Catholic.
In 2013, the Succession to the Crown Act came into force.
In 2013, the Succession to the Crown Act changed many provisions of the Act of Settlement.
In March 2015, legislation amending the Act of Settlement came into effect across the Commonwealth realms, following the Perth Agreement. The amendments removed the disqualification arising from marriage to a Roman Catholic and instituted absolute primogeniture.
In 2015, Peter Phillips' place in the succession was restored after Autumn Kelly, whom he married, converted to Anglicanism prior to the wedding.
In 2015, Prince Michael of Kent was restored to the line of succession and became 34th in line after the Succession to the Crown Act 2013 came into force.
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