I return to my original point, that it's not fair or even respectful to ask a minister to appear before a standing committee with little notice. Given that there are some time constraints, due to the supplementary estimates (B) supply period, I think inviting her and her officials no later than December 2 does make some sense. Like all our invitations to all the ministers, they have the right to say yes or no.
On November 25th, 2014. See this statement in context.