"You also need to stop your canadian free medical insurance. "
I'm not sure if that makes sense. Obviously you shouldn't renew you health card (or you driver's licence or anything that would imply you intend to maintain residency) once you leave but why would anyone? There is no requirement that you actually take any active steps to cancel your provincial health care.
Anyone having questions about residence status can find all the information they need in Interpretation Bulletin IT-221.
http://www.cra-arc.gc.ca/E/pub/tp/it...onsolid-e.html