Technically what you are saying is true, but in reality, at least at every club I have been at, the event CD is nearly always a club member and the event is sponsored by the club and the CD is the CD of the event not only on behalf of the AMA, but is responsible to the club as well for running the event properly.

I agree that AMA rules and event rules are the ones in effect during an event. In fact, at our club, we have a few events that allow slightly different things under the event rules than during normal flying. For instance, at an electric event, we allow as many electric warbirds to fly at at the same time as there are pilots willing to fly the. Normally, we only allow 5 models to be be flown at once, but the Warbird Roundup is great fun with 15-20 in the air at once in the pattern. Has been done without incident a number of times around here.