On March 19, the Chief Electoral Officer of Canada, Stéphane Perrault, received official notice from the Speaker of the House of Commons that the seat for Eglinton–Lawrence (Ontario) is vacant. Marco Mendicino resigned his seat in Parliament to become Chief of Staff to newly elected Prime Minister Mark Carney. Under the law, if a vacancy occurs less than nine months before the fixed date for a general election, no by-election is called, and the seat remains vacant until the general election. Therefore, no by-election will be held to fill this vacant seat.