This won't help you much, but Canadian rules - CEC 2006, as adopted, do require AFCI's on a total panel change out. AT least, that's what most of the Alberta AHJ's seem to demand. And I emphasize "most", because there is still a bit of confusion between the different AHJ's on exactly how to interpret the CEC. I've quoted the same code item to at least 5 different Inspectors now and the consensus is still split 2 to 3 on what is required.

The easiest thing we have done is just quote the customer on AFCI's ( and GFCI's as well) before we do the reno and just put them in when we change the panel. I know it's a few bucks more on the quote - maybe $200.00 to $500.00, but it sure saves a lot of hassle later on at Inspection time, and in the ultimate end, if some fool partially shorts out the good old bedroom extension cord to the clock radio, at least it's saved their life and --- drum roll---- I get a chargeable callback when the beast downstairs decides it's gonna keep tripping.