I will not even pretend to be a specialist in this area, sir.
This issue is obviously the subject of negotiation, as they all are. We try to work, as Steve said in another context, to what fits the best to a Canadian situation, recognizing that we have interests of carriers, travellers, airports, shippers, etc. No one size fits all, so as we go through the various negotiations with major partners or smaller partners, each situation will have to be viewed on its own.
If you want to drill down, we can give you the details and talk to our chief negotiator, Robert Ready. He is best placed to answer any technical questions.