I understood it to be any three members, because that's why we have vice-chairs. It could be Jean and two other members. In that case, I think I've seen cases where, of the three people who show up, one of them is designated as chair if for some odd reason the chair or the two vice-chairs don't show up. But you're there to listen to witnesses—and it should be the three, as long as one is from the opposition and someone is designated as chair. So I understood that to mean any three members, because it says “at least three members are present”, and it doesn't designate what positions have to be there; otherwise, it would defeat the purpose again.
On May 3rd, 2006. See this statement in context.