I am not sure what statement USAC is making with the feature race I just witnessed. I have never seen a car allowed to continue to run with a flat tire, I thought that is why they have a black flag. It is to be used to get a car/driver off the track when it is no longer safe for them to race or they have broken the rules. In this case, I do believe Levi met both conditions, he had a flat RR which was very dangerous, not only to himself but to everyone else on the track AND he passed the pace car/truck which I think is a rule violation.
Just before the restart, it was annonunced he was going to be allowed to stay on the track at the tail of the field, then all of the sudden, the pace truck pulls into the infield and the flagman 'instructs' everyone to catch up to Levi.
I am very thankful no one was hurt as a result of this negligence by USAC's officals.