In terms of the 48-hour notice, my understanding is that's for substantive motions or motions that aren't related to the current topic. For instance, if our topic is on what the business of the committee is going to be, then a motion that comes during the course of that discussion would be okay even if there's not 48-hours'...?
Evidence of meeting #4 for Status of Women in the 42nd Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was gba.
A recording is available from Parliament.