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The first 36 starting positions are determined by speed during the qualifying round. The final seven positions (37-43) are called provisional starting positions and are based on a combination of car-owner points and past champion status.
At the start of the season, each team is allowed four provisional starting positions and will receive an additional provisional entry after every eighth qualifying attempt. A maximum of eight provisionals are allowed to be used thoughout a season. If the team in question is in the top 25 in points, a provisional start does not count against the season's allotment.