Mr. Regan is participating. However, he is being substituted for Mr. Lauzon, as Mr. Lauzon is still currently in the meeting. Mr. Lauzon would be the member we are counting for purposes of quorum, and so on. Until such time as Mr. Lauzon leaves, if he does leave, Mr. Regan would be here in a capacity as a non-member just sitting in on the meeting. Should Mr. Lauzon absent himself, or leave, then I do have official notification from the Liberal whip that Mr. Regan would be the formal substitute for Mr. Lauzon.
On March 9th, 2021. See this statement in context.