Penalty Kick in Extended Time

Please when a foul has been called that results in a penalty kick being taken after time has expired, what is/are the proper procedure(s) regarding the placement of the two teams (the other typically 20 players) now that the game is over and the penalty kick needs to be taken?

There is nothing specific in the NFHS Soccer Rules Book for this situation.

As per Alan Brown, NJSIAA State Interpreter, only the kicker and goalkeeper can participate.  Once the kick is taken and the ball either goes out of play, is touched again by the kicker or has it'smomentum spent, the kick is over.  Having players other than the kicker and golkeeper present can only lead to complications.

Have the other players go to their respective team areas.