An aluminum panel would perform a prohibited function - a structural purpose. The rules allow you do mount an AL panel, but then tell you if it strengthens the frame (of course it will) then it's illegal. Aluminum foil is about the only panel allowed.
How the hell are you missing this? The rule applies to frame exterior panels, CLEARLY. This section needs to be deleted entirely so that safety panels may be mounted in FC. Direct conflict in the rules are a sign of crappy rules-writing.If the Radon mounted a .060 or thicker aluminum panel on 6" centers to the side of the car, then that rule would not even apply to it.
GCR_9.1.1.3.f: Frame-exterior panels (including, but not limited to, body and anti-intrusion panels) and fastening system(s) shall not be designed or installed in such a manner that they serve any structural purpose other than that of anti-intrusion.
Of course it changes and adds to the rules. There would be no bloody point in requesting one if it didn't.I don't have to be emotionally invested to realize that a clarification doesn't change the rules.