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His Excellency the Right Honourable David Johnston, Governor General of Canada, will preside over the swearing-in ceremony of Prime Minister-designate Justin Trudeau, Canada’s 23rd prime minister, and members of the 29th Canadian ministry.The event will take place in the Rideau Hall Ballroom on Wednesday, November 4, 2015, at 10:30 a.m.Rideau Hall has made this explainer graphic available.