The 107 percent rule sets a minimum qualifying time limit. A driver must lap within 107 percent of the fastest Q1 time. If the fastest lap is 1 minute 40 seconds, the limit is seven percent slower. Drivers outside that range may not start the race.
Stewards can allow exceptions in special cases. For example, a driver slowed by a red flag might still be approved. The rule ensures cars are competitive and safe. It prevents very slow cars from joining the grid. Meeting this limit is essential to race.