I think Kevin characterized it well: he said it boils down to the goodwill on both sides of the border. If both sides want to work constructively to find a resolution to this matter, then there is sufficient time available between now and the end of the 100 days to be able to do that.
I can tell you from my involvement that the Canadian authorities are working actively on this issue. The delays have been on the other side in putting forward their positions to Canada.