I would say generally not in terms of a numerical assessment of number of taxpayers affected. When there's a change in the treaty policy, for example, a change in withholding tax rates, that Canada might be willing to offer in most or all of its negotiations, that's something that would be costed. Sometimes it's actually been a budget pronouncement announcing that change in policy and providing an estimate of costs, but not on a treaty-by-treaty basis for the most part.
On May 29th, 2014. See this statement in context.