I am often asked to tell the motoring public that it is illegal to change lanes in an intersection. I cannot do this, because there is no specific rule prohibiting this driving action in B.C.'s Motor Vehicle Act. However, a defensive driver will choose not to do this, even if it is legal.
The Rules About Changing Lanes
The Motor Vehicle Act prohibits lane changes when doing so is unsafe or will affect the travel of another vehicle. In addition a driver must not change lanes if it means crossing a solid line.