Go here and D/L my Cease and Desist template. Just update the first line to read: "Pursuant to my rights under ONTARIO REGULATION 103/06," as the act was updated.
http://www.docstoc.com/docs/16640811/Cease-and-Desist-template-letter-for-Ontario-residents
Or, if you'd prefer a generic one for all of Canada, go here:
http://www.docstoc.com/docs/47236056/Cease-and-Desist-letter-for-Canadian-residents