A bit of a history question for those that might know -- Rule 6-3-10-b and c cover illegal scrimmage kicks (the return kick and a kick beyond the neutral zone) that are live ball fouls that cause the ball to become dead.
Why? No other codes (Fed or NFL) have this stipulation (or even define 'return kick'). In fact, one of the Fed "Football Fundamentals" is "No live-ball foul causes the ball to become dead".
As far as I can tell, those are the only two examples unless I missed another.