Our credit card provides access to airport lounges via Priority Pass memberships. This includes Club Mobay however to the best of my knowledge you can only use it on departure. On our recent trip, after checking our bags with Air Canada we just walked up to the Club Mobay booth at the entrance to the security screening hall, had our Priority Pass swiped and we were fast tracked through security. We then went to the lounge to wait for our flight. If there is a way to use Priority Pass on arrival I have not been able to find it.