The relationship between the Commonwealth realms is such that any change to the rules of succession to their respective crowns requires the unanimous consent of all the realms. Succession is governed by statutes, such as the Bill of Rights 1689, the Act of Settlement 1701, and the Acts of Union 1707. In 1936, King Edward VIII abdicated and any possible future descendants of his were excluded from the line of succession. As the Statute of Westminster 1931 disallowed the UK from legislating for Canada, including in relation to succession, Order in Council P.C. 3144 was issued, expressing the Cabinet's request and consent for His Majesty's Declaration of Abdication Act 1936 to become part of the laws of Canada and the Succession to the Throne Act 1937 gave parliamentary ratification to that action, together bringing the Act of Settlement and Royal Marriages Act 1772 into Canadian law. The latter was deemed by the Cabinet in 1947 to be part of Canadian law, as is the Bill of Rights 1689, according to the Supreme Court of Canada. The Department of External Affairs included all succession-related laws in its list of acts within Canadian law. In 2011, Canada committed to the Perth Agreement with the other Commonwealth realms, which proposed changes to the rules governing succession to remove male preference and removal of disqualification arising from marriage to a Roman Catholic. As a result of the Perth Agreement, the Canadian parliament passed the Canadian Succession to the Throne Act, 2013, which gave the country's assent to the Succession to the Crown Bill 2013, at that time proceeding in the parliament of the United Kingdom. In dismissing a challenge to the law on the basis that a change to the succession in Canada would require unanimous consent of all provinces under section 41(a) of the Constitution Act, 1982, Quebec Superior Court Justice Claude Bouchard ruled that Canada "did not have to change its laws nor its Constitution for the British royal succession rules to be amended and effective" and constitutional convention committed Canada to having a lines of succession symmetrical to those of other Commonwealth realms. The ruling was upheld by the Quebec Court of Appeal. The Supreme Court of Canada upheld the ruling when it declined to hear an appeal in April 2020.