The chair has a responsibility to maintain order and decorum in the committee. I've made a ruling. I've indicated to you... You have made your argument twice--at least. I understand, but that can't supersede the motion adopted by this committee and our rights delegated under section 108 of the Standing Orders from the House to have this person appear and to ask questions and have them answer them.
We don't have an obligation to respect your departmental rules. We have the rules guiding this committee. So I've made my decision, and again, for the final time, I'm going to ask Mr. Sparrow to answer the question.