was split into four, ten-minute sessions. Each car was permitted three laps per session, including the laps required for leaving the pits, and for re-entering it. This allowed one lap to set a competitive time. There was a five-minute break between sessions, which added up to a total of 55 minutes for qualifying. The grid for the Sprint Race was set based on the cars' fastest time from either the first or the second session. The grid for the Feature Race was determined the same way, but using sessions three and four. However, if there was a red flag due to an accident on the circuit, the timing to the end of qualifying continued to run. Sprint race The Sprint Race used the grid determined in sessions one and two of the previous day's qualifying session, and was held in the early afternoon. The race began from a rolling start, and its duration was a maximum of 24 minutes plus one additional lap. Additionally, each team had to make one mandatory pit stop between laps four and eight. Drivers were permitted four uses of PowerBoost during the Sprint Race. Feature race The Feature Race used the grid determined in sessions three and four of the previous day's qualifying session, and was held mid-afternoon. The race began from a standing start, and was a race of approximately , with a maximum time limit of 69 minutes plus one lap. Teams had to make two mandatory pit stops during the Feature Race, one between laps eight and sixteen, and another during a pit window, which was not announced until the first window has closed. Drivers were permitted eight uses of PowerBoost during the Feature Race. Pit stop Each team had to complete three compulsory pit stops over the course of the race weekend – one during the Sprint Race, and two during the Feature Race. During the pit stop, all four tyres on the car had to be changed. A total of eight mechanics could be used during the stop, however, only four were allowed to 'touch the car', none of which (save the so-called "lollipop man" that directed the car into its pit) could be present in the pit lane before the car came to a complete halt. Refuelling was also not permitted; infringements of these rules or of the pit-lane speed limit resulted in the imposition of a drive-through penalty.