I was going to register for an event at Road America thats being held by the Porsche club in Minnesota. They have a rule that all cars must have a fire extinguisher mounted inside the car with a metal bracket (even stock production cars). I've been to events held by many different clubs and have never heard of such a rule. I'm not about to drill in my interior to mount a fire extinguisher. Even if I had a fire, I would let the corner workers handle it because they would know better than I how to best handle it. Has anyone ever seen such a rule for an event?