Published October 21, 2012 | 9:17 pm
The votes will be held in the ridings of Victoria in B.C., Calgary-Centre in Calgary and the Ontario riding of Durham.
Former cabinet minister Bev Oda quit following controversy over her expenses, leaving the Durham riding vacant, while New Democrat Denise Savoie resigned her Victoria seat for health reasons and Conservative Lee Richardson left in Calgary-Centre to work for Alberta Premier Alison Redford.
All three MPs resigned their seats over the course of the summer.
A Supreme Court of Canada decision on Thursday will determine whether Harper will have to call another byelection for the Ontario riding of Etobicoke Centre, or if Conservative MP Ted Opitz will get to keep his seat.
The local Elections Canada offices in these electoral districts will be open shortly.
Electors will be able to vote at advance polls on Friday, November 16, Saturday, November 17 or Monday, November 19; on election day; or by special ballot. Electors who wish to vote by special ballot must apply for their special ballot voting kit no later than 6:00 p.m. (Eastern Time) on Tuesday, November 20. Applications are available at www.elections.ca, by phone or in person at local Elections Canada offices and Canadian diplomatic or consular offices.