Mr. Chair, I have one more question. This might be better directed to the Canadian Energy Pipeline Association. I sure hope they're going to have an opportunity to participate.
A couple of you have spoken quite eloquently about what would happen if we tried to do more upgrading and more refining in Canada and the impact it would have on shipping, with contamination and so on. Basically we have a lot of single-purpose lines going out of our country into the export marketplace. If you try to use those lines for different purposes or for shipping different products....
Are pipelines generally built to handle a specific kind of product? Are they designed to handle the full suite of products? What are the costs? What would we see for an increase in costs, Mr. Boag, if for example we tried to run bitumen for a couple of days, then we tried to run diesel for a couple of days, and then we tried to run jet fuel for a couple of days through a pipeline that stretches over thousands of kilometres?