This would be the last Canadian viceregal appointment made by the monarch in his or her capacity as sovereign of the United Kingdom, as it was decided at the Imperial Conference in October 1926 that the Dominions of the British Empire would thereafter be equal with one another, and the monarch would operate for a specific country only under the guidance of that country's ministers. Though this was not formalised until the enactment of the Statute of Westminster on 11 December 1931, the concept was brought into practice at the start of Willingdon's tenure as Governor General of Canada.