As of 2015, the 43 starting positions for Sprint Cup Series and XFINITY Series superspeedway events at Talladega Superspeedway and Daytona International Speedway are determined by the posted lap times of two rounds. The top 12 drivers from the first round advance to the second and final round.
The starting positions for the first round are determined by random draw, with the fastest 12 drivers of round one advancing to the second round; the 13th through 43rd positions are determined by the official times of drivers not making the cut to round two. The order for the second round is arranged by the recorded times of drivers in round one, with the one through 12 positions of the race ultimately dependent on round two.
Race vehicles are granted a single, timed lap in each qualifying round and are released in a pre-determined time interval. Vehicles are impounded following each qualifying lap; drivers that advance to the final round are allowed to utilize a cool-down unit and adjust tape during the 10-minute interval.
In the case of rain after the first round, NASCAR does have the option of declaring the qualifying session over. The speeds from the first round then determine the final starting positions for the race.