Before becoming an official candidate in an election, first one must be nominated by their chosen party in their chosen riding. They need to fulfill the party’s requirements to be a candidate for the nomination. All the party’s members that live in that riding vote can for the candidate of their choice. The real competition here is signing up as many new members (who have to purchase a membership) and getting them out to vote. The person with the most votes wins the nomination and becomes the general election candidate for their party for that riding. More plainly, it’s the election before the election!