[FMadera]

I'll paraphrase:

15.2.4.1: If the foot or hand go beyond the center line, if part of the hand or foot are above or on the center line, there is no violation if there is no interference. Whether or not there is a safety hazard makes no difference at all, so long as the hand or foot is on or above the line (again, so long as there is no interference).

now, if the hand or foot goes beyond the line, 15.2.4.2 kicks in...

15.2.4.2: Body part is beyond the center line, now safety considerations are taken into account, and you can call a violation based on safety concerns. If there is no body part on or above the center line, a fault occurs regardless of safety concerns.

Hope that makes sense.