ET ranges are usually set by Division directors. Whether the tracks follow it or not is up to them. if they compete in the ET finals, with hopes to go to Pomona for the national title then they should follow the format chosen for there set by NHRA. Otherwise they are doing their racers a disservice. FWIW out here in the wild wild west 7.50 is the minimum ET for Pro. I remember a few years back, 10 or 11 that the National Finals in Pomona the ET minimum, for Pro was 10.00, I had a friend competing for D7 that ran 9.70;s back then and made all his time runs in the 9's at Pomona. Before first round her was notified that the minimum was 10.00. Be nice to have some conformity across the divisions. One last tidbit I will throw out there that is 100% MY opinion. Open cockpit cars, particularly dragsters have NO place in Pro/Bottom bulb racing. Just my opinion but I don't think they belong.