I do not think he did at all. Based on what OP wrote,srothstein wrote: But also, I would think you just received effective notice from the organizer
"This year, in addition to chicken wings, pizza, and soft drinks, we are also going to be selling beer. He mentioned that because of this, I can't conceal carry at the event."
The organizer was just relaying to him it would be a 51% location this year, that is not the same as giving 06/07 notice.