Here's a link to the government's summary of changes:

http://www.mto.gov.on.ca/english/trucks/motor-vehicle-inspection-stations.shtml#passenger

That site includes a link to the Ontario government's full regulations as a PDF file.

Much discussion at my local car club over how all of this might affect modified street rods, rat rods etc. It's still not clear, but much of the suspension and height rules seem aimed at guys who jack up their 4 x 4's for mudding, etc.
Cheers,
John