Rennie:
I'll grant that the likelyhood of the Stewards acting on their own to enforce the rule as I've outlined is remote, but, guess what? All it will take is someone to decide to take a picture of a car cresting a rise that is obviously non-compliant, file a protest, and the Stewards will have no choice on the matter because that is exactly how the rule is worded!
Or is logical thought, and properly worded rules, something that you can't comprehend?