Comment by simiones

I don't think the law is so specific, but I suspect the right interpretation would be that you should pass through the intersection if the car is in a position where it would block other traffic the moment the light turns red; in any other circumstance, you should stop if the light is red, even if you passed the location where you'd normally wait.

For example, say you're entering the intersection on green/yellow, but the car in front suddenly stops while you're on the crosswalk, possibly not even seeing the light on the side of the road, but no part of your car is impeding the cross traffic. Well, even if the car in front now clears the intersection, if the light has turned red, you should almost certainly stop and wait for the next green light, rather than trying to clear the crosswalk: doing anything else is much more dangerous.