Now there is a Post Scrimmage Kick penalty enforcement.

PSK fouls are the following: 

A foul by R occurs,   

    1) During scrimmage kick plays, other than a try or successful field goal

    2) During a scrimmage kick play in which th eall crosses the expanded neutral zone.

    3) Beyond the expanded neutral zone

    4) Before the end of a kick

    5) And K does not have possession of the ball when the down ends and will not be next to put the ball in play.

This only applies to fouls by R.  The meaning behind this is that K has decided to end their series and just because R fouls, it shouldn' t give K the ball back.

Hope this helps.