Correct. It only applies to vehicles registered in Quebec and it expires March 15thMy understanding of the law is if your from the states you can drive around without snow tires. It’s a law for people who live there year round.
Winter Tires: Mandatory from December 1 to March 15 inclusive. From December 1 to March 15 inclusive, all motorized road vehicles registered in Québec (other than heavy vehicles, tool vehicles and farm machinery) must be equipped with winter tires.