Just very briefly, Mr. Chair, perhaps I can answer some of those questions.
There is a standard guideline, prepared by the House, that is given to witnesses. I have a copy I could send to you. In terms of this committee, what we've normally done, Tim and I.... Certainly I send letters to the witnesses and phone them. We identify the themes of what we're doing, so the broad questions. If available, I always send the previous blues, the evidence. I normally establish a working dialogue with them to ensure that the presentation is focused on those areas.
In some instances witnesses will do what witnesses do: they see this as an opportunity and they have their own agenda. That happens. But that's all we can do.