I also brief at the coin toss With CARs.I am quite clear on the point that I am the only one who calls for fouls and missconduct. I still get the odd one who flags like mad for fouls and then gets defensive when I tell them not to. When I am a NAR I think it would be a waste of my time if I was just giving throws, corners offsides. I wouldn't ask that of my NARs and I have never been asked that myself.