Here is info from the MTO regarding use of studded tires
http://www.e-laws.gov.on.ca/html/regs/english/elaws_regs_900625_e.htm“Northern Ontario” means the Territorial Districts of Algoma, Cochrane, Kenora, Manitoulin, Nipissing, Parry Sound, Rainy River, Sudbury, Timiskaming and Thunder Bay;
9. (1) No person shall operate a vehicle equipped with studded tires on a highway unless all of the following conditions are met:
1. The vehicle is operated during the period starting on October 1 and ending on April 30.
2. The permit holder of the vehicle is,
i. a resident of Northern Ontario,
ii. a corporation with a business premise in Northern Ontario, as shown by the address on the plate portion of the vehicle permit,
iii. a municipal corporation having jurisdiction and control of a highway or portion of a highway located in Northern Ontario,
iv. a road authority having jurisdiction and control of a highway or portion of a highway located in Northern Ontario,
v. a district school board in Northern Ontario,
vi. a school authority in Northern Ontario,
vii. Her Majesty the Queen in right of Ontario, or
viii. not a resident of Ontario and the vehicle is in Ontario for no longer than 30 days.