Thanks for your replies, I found the answer.
http://tranbc.ca/2013/10/29/shift-in...-winter-tires/
"What’s Legal: The legislation as written accommodates M + S tires. B.C. RCMP will continue with past practice of allowing either tires with a snowflake symbol or a mud and snow designation on highways where winter tires are required, as long as they are in good condition, with good treads (worth repeating)."