Originally Posted by iDontAlwaysDrink
On this NASA tech inspection form, last item under wheels and tires. SpeedVentures and Speed District and Extreme Speed also follow a similar format. Many organizers count on you to have read it prior to your signing off on your inspection and depend on you to have dealt with any problems listed for the safety of all on track participants.
Even so, I've never been to any event where a tech or any track official made people take center caps off or even make mention of them.