Mr. Speaker, the process being put in place is to ensure that people who are voting abroad through a special ballot will have their vote count in the electoral district where they last resided in Canada. That requires some proof of when they actually emigrated to another country to reside in a different place internationally.
By providing identification which shows their previous address, that makes sure that their ballot and vote is being counted in the right electoral district. This stops anyone from trying to game the system by collecting a lot of international votes from many citizens abroad and putting them all in one single or a very few electoral districts.
This way, if an individual left a certain electoral district in Canada, went abroad and cast a ballot, which they are rightfully able to do, it will count in the same electoral district where they used to reside.