Originally Posted by Adam Smith

Moderator note: as this is a federal government requirement rather than one imposed by AC, in moving this thread to the Canada forum.

What constitutes "valid" depends on the entity imposing the requirements. The government of Canada clearly states that an expired document is not valid for the purposes of boarding a plane in Canada: "All government-issued identification documents (Canadian or foreign) must be valid. They cannot be expired."

Voting is not an accurate comparison because you don't need any photo ID at all to vote in a federal election. There are various ways to prove who you are and where you live that don't involve a driver's licence, passport, etc.

You can't use an expired ID to buy alcohol in Alberta (see 5.5.8). Or Ontario. Or Nova Scotia.

Outside the outlier of voting, I can't think of anywhere that an "expired" ID is considered "valid".