Check out this site
Newmarket is in York region, so these are the bylaws that would apply to Newmarket. They don't have any Bylaws listed for pets on the website but they do exisit. Find the phone number for the office and then ask to speak with someone out pet bylaws, specifically exotics and they should have the information you need.
I'm just a bit North of you in Keswick and the bylaws here are very restrictive. No Boa's or Pythons, of any genius.