Thank you for the question. The constitutional dimensions of this issue relate to the prospect that the federal government, rather than acting simply as the signatory of the NAFTA, assumes responsibility for whatever fines or awards are levied in relation to NAFTA chapter 11 when provincial or territorial measures breach this treaty. If the federal government, rather than assuming that responsibility, attempts to hold provinces liable and insists that they pay in whole or in part, that really changes the constitutional calculation, particularly when they're acting within areas of exclusive provincial jurisdiction.
That's where I see this slow-moving constitutional crisis potentially developing.