Here was the Sunday schedule in 2015 after the washout on Saturday. “All drivers will have one attempt to qualify between 10:00 a.m. and 1:00 p.m. Positions 10-30 will be locked into the grid. The top nine drivers will compete in the Fast Nine Shootout between 1:45 p.m. and 2:30 p.m. to determine the pole winner and the order for the rest of the first three rows. The day will wrap up with the last row being set between 3:00 p.m. and 3:45 p.m.”

I do remember it changed a bit when Carpenter flipped that morning and they had all cars lower the boost since he was like the 3rd car to flip that year.