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.