Person to Government Dispute Settlement in Canada

This is from Canada's Premiers (a group made up of Canada’s 13 provincial and territorial Premiers.)

Premiers also announced the coming into force of an improved Person-to-Government dispute settlement process under the Agreement on Internal Trade (AIT). The new dispute process includes the introduction of monetary penalties for non-compliance with panel reports. Creating a fairer and more transparent process for persons and firms to challenge regulatory practices when government measures are considered inconsistent with the AIT, [it] will increase accountability and improve the flow of goods, services, investment and labour.

The basic idea is that individuals in one province/territory who are blocked from offering goods or services in another province/territory will have recourse to the AIT, and this recourse will be more effective now than it was in the past.

The relevant AIT text is here. See, PART B: Person-to-Government Dispute Resolution, on p. 17.  It will be interesting to see how this works in practice.

I am a little confused as to why Canada pursued a domestic inter-provincial trade agreement in order to provide this individual remedy, which sounds really daunting.  Isn't economic integration something a domestic constitution could and should do? But maybe tweaking their constitution would have been even harder.