Referees
Team leaders (or players in charge) can call a referee if they suspect a violation of the rules or have a question regarding the rules. This will pause the ongoing match (state update).
A referee can be called with a command and gets notified respectively. The "case" gets documented and the match continues after the referee marks the case as solved. Any consequences (e.g. disqualifications - game or tournament/player or team) have to be considered in upcoming matches and evaluations.