Canadian citizens just go to the voting station and identify themselves .Their name is stroked off the list and they’re are given a ballot.
In those days , before computers, the enumerators went door to door for every federal election updating voting lists.
A friend moved here from Holland in 1970 and was enumerated for the 1972 federal election. He wasn’t home, his Canadian born wife gave them her name and that of her husband and he was on the list.
The enumerators, (2 local ladies ) never bothered to ask for citizenship. I suspect that happened a lot.
Thanks for the info...this is getting interesting...