I find these two rules, under the Referee Interaction section of the Game, very interesting:
4.3.6 Referee Interactions
<G42>
Any discussions regarding rules, scores, or penalties must be between the DRIVERs or HUMAN PLAYERs (pre-college team members) and the head referee.
<G43>
The Head Referee may at his or her discretion receive input from other sources, particularly Game Design Committee members that may be present at an event. However, the Head Referee’s decision is final (reference Rule <T01>).
This means: No Coaches interacting with referees, and that Head Refs can get input on their decisions.