Right, though what I was getting at is not so much the clauses of the bill but whether, if the committee feels that probably the best evidence comes from a lower-level official and the minister decides she doesn't want to bring that official to the table at time X, it would be within the committee's purview to communicate that publicly or put pressure on the minister in some other fashion to make sure that the person is sent to the committee.
On November 29th, 2016. See this statement in context.