In BC, it is the law that all vehicles must have winter tires between October 1 and April 30. Winter tires must be rated for snow and ice and have the mountain/snowflake symbol on them. All-season tires are not considered winter tires. studded winter tires are also allowed in BC but only from October 1 to March 31.
Drivers who do not switch to winter tires may be fined $109 and 3 driver penalty points will be added to their record if they are pulled over by police.