Making A Player a Referee

[Lambdadelta]

You are able to make a player become a "observer" with:

call SetPlayerState( observer, PLAYER_STATE_OBSERVER, x )

I don't exactly know what the value of x does, I'd assume 0 would remove the status and 1 or higher would apply the status. Observers do not have as much rights as Referees do, such as talking to all players.

Is there a way to make a player become a referee ingame by triggers?