One example mentioned by the official from the C.D. Howe Institute was not being able to walk from one province to another with alcohol. That is indeed a rule that I think is unnecessary.
There are also railway tracks and trucks. Apparently, nine out of ten Canadian provinces have the same rule when it comes to the bar at the back of trucks.
Looking at these examples, the answer is easy. It's when you drill down that it becomes more difficult. Canada is a federation, and we have to remember that. That is true for Quebec, and also for the other provinces and territories.