There are no specified times within which you have to deposit your notice of ratification. Obviously the earlier the notice of ratification is deposited, the earlier the entry into force. Then the next step is the entry into effect of this instrument. Because of the way this multilateral instrument works, there is a bit of a lag between a deposit of ratification and its entry into effect. If we were to deposit our notice of ratification any time before the end of September 2018, generally speaking the MLI would have effect with respect to Canada starting January 1, 2019.
To the extent that we deposit our notice of ratification after September 30, 2018, there would generally be a year's delay in its entry into effect. Some provisions would have effect midway through 2019, but with respect to many of the provisions, there would be a delayed application until January 1, 2020.