 The National Register of Electors is used to produce " lists of electors for election and referendum purposes " , and for by @-@ elections . Elections Canada prepares the preliminary elector lists for every polling station of each electoral district based on address information contained in the National Register of Electors . During the election period , returning officers for each electoral district use the lists to revise information for eligible electors . The lists are also used by candidates during their campaign in the election period , and by Elections Canada to " calculate election expense limits for political parties and candidates " . 
