Panel swap and arc fault breakers requirements Ontario

You are going to need to deep dive into the Code for this one or at least grab one of the "Coles Notes" versions. An ESA inspector is going to really check your work and I would be surprised if you will even be able to get a disconnect from your local utility anytime soon. All the ones in my area are only doing emergency disconnects.

I believe there is another thread for electrician questions and you should be able to find answers there if you use the search function.

Good Luck

You do not require any arc fault breakers for anything that is not presently on an arc fault breaker in your existing panel.

Any new circuits in the future will have to be completed to the code at the time of install so they will require arc fault protection.

EDIT: Make sure your gas line is bonded to the water line (or other house ground) as they always check for that.