Mr. Speaker, the purpose of this is fairness and equality for all Canadian voters. When a voter goes outside Canada for a vacation, they are required to prove their place of residence, as is every Canadian still living in Canada and not vacationing outside the country. When they go to the voters booth, they have to prove where they live. This is making it equal and fair so that people who no longer live in Canada do the same.
In the House of Commons on February 3rd, 2015. See this statement in context.