33.7. When the office of mayor or councillor becomes vacant more than twelve months before the fixed election date prescribed for that office by the act governing the municipality, the returning officer shall begin election proceedings to fill the office by publishing, within eight days after the vacancy has occurred, the notice provided for in article 303 of the Municipal Code (chapter C-27.1) or section 156 of the Cities and Towns Act, or Schedule A in the case of the cities of Montréal and Québec.
The election is conducted in every respect as a prescribed election at a fixed date, mutatismutandis, subject to section 146 of the Cities and Towns Act, which also applies to the cities of Montréal and Québec, mutatismutandis.
A person elected at the election remains in office for the remainder of the term of the council member that he replaces.