The weird trade things between the provinces are more to do with special exceptions and regulations around alcohol, trades regulation, etc. than the kind of tar

The weird trade things between the provinces are more to do with special exceptions and regulations around alcohol, trades regulation, etc. than the kind of tariff-oriented things people are talking usually with "free trade". They're a product of the fact that Canada, like the US, is a highly federal system and the provinces have strong powers. In some cases, stronger than in the US system (and in other cases, not) In any case, we already have a free trade agreement with the EU. In some respects for some products its better than what we have with the US.