Typically, conventions, and specifically tax conventions, have a differing entry into force and entry into effect. It would be in force in respect of Canada; however, it would have no effect on any of our tax treaties, on any transactions that taxpayers undertook, until the date of entry into effect.
There are two different dates of entry into effect depending on the particular tax that would be impacted by the convention. Most of those that would be impacted—or many of them—are withholding taxes. That is where you get the potential full calendar year delay, because it enters into effect on January 1 of a calendar year. That's generally to allow companies, businesses, to adjust withholding systems, etc., to reflect changes in the treaty.