Originally Posted by Matt Trimmings

Pretty much any national level event (Nationals, Cactus Classic, Hot Rod Shootout) and even regional (regionals, state champ races, etc) level events. Not really done at a club race but its always good to make sure your legal so that if you ever do go to a race where they check you will be good to go. This is done with wheels, tires, body etc...ready to race.