I'm getting a lot of conflicting opinions on this. My interpretation is that the chair has 48 hours after the decision to hold the meeting to decide when we will get into the substance of this, which would be Wednesday.
Evidence of meeting #69 for Public Accounts in the 39th Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was meeting.
A recording is available from Parliament.