Since you know it up front if you read the entry form, which is published each and every race, you just have to decide whether to race or not. If you race three or more races with USAC, it is worth your money to buy the USAC badge for the year. You get pitpasses cheaper and get to keep the $100. This is to get more cars to run with USAC and travel. The Michigan race is a USAC sanctioned event, therefore, it is USAC rules.
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