first, let me start off by saying i dont like roar. i dont attend roar events on a regular basis, only when there is a "really good" race that is in my home state *ie truck nats @ nitropit*
Rules are needed for club racing. Roar has a good "basic set of rules" that all tracks can use as general guidelines for adopting their own rules.
I've never raced at a track where "anything goes, run what you brung" and i never will.