This flag is normally used to start the race. The starting signal should be given by lowering the flag which, for standing start events, should not be raised above the head until all cars are stationary and in no case for more than 10 seconds.Should the national flag not be used for any reason, the colour of the flag (which should not cause confusion with any other flag described in this Chapter), should be specified in the Supplementary Regulations.
This flag should be waved at the start line when it has been decided to stop a practice session or the race. Simultaneously, each observer's post around the circuit should also wave a red flag. The red flag may also be used by the Clerk of the Course or his nominee to close the circuit.
The chequered flag should be waved and signifies the end of a practice session or the race.
This flag should be used to inform the driver concerned that he must stop at his pit or at the place designated in the supplementary or championship regulations on the next approach to the pit entry. If a driver fails to comply for any reason, this flag should not be shown for more than four consecutive laps.The decision to show this flag rests solely with the Stewards of the Meeting, the team concerned will immediately be informed of the decision.
This flag should be used to inform the driver concerned that his car has mechanical problems likely to endanger himself or others and means that the he must stop at his pit on the next lap. When the mechanical problems have been rectified to the satisfaction of the chief scrutinizer the car may rejoin the race.
This flag should be shown once only and is a warning to the driver concerned that he has been reported for unsportsmanlike behaviour.
A blue flag with a red saltire (diagonal cross), to indicate that a lapped driver must pull in to the pits.
The solid yellow flag, or caution flag, universally requires drivers to slow down due to a hazard on the track and it is used in 2 different ways:
Yellow flags should normally be shown only at the marshals' post immediately preceding the hazard. In some cases however the Clerk of the Course may order them to be shown at more than one marshals' post preceding an incident.Overtaking is not permitted between the first yellow flag and the green flag displayed after the incident.Yellow flags should not be shown in the pit lane unless there is an incident of which the driver should be made aware.
This should be shown motionless to inform drivers that there is a deterioration of adhesion due to oil or water on the track in the area beyond the flag.This flag should be displayed, for at least (depending on the circumstances) 4 laps unless the surface returns to normal beforehand. It is not however necessary for the sector beyond where this flag is being shown to show a green flag.
Faster car approaching, cars being lapped must move off the racing line to allow the faster cars to pass or face a penalty.
This flag should be waved and is used to indicate to the driver that there is a much slower vehicle on the sector of track controlled by that flag point.
This should be used to indicate that the track is clear and should be waved at the observation post immediately after the incident that necessitated the use of one or more yellow flags. It may also be used, if deemed necessary by the Clerk of the Course, to signal the start of a warm-up lap or the start of a practice session.