The minimum size of all flags is 60 x 80 cm except the red and chequered flags which shall be at least 80 x 100 cm.
⚠ Flag signals to be used by the Race Director, the Clerk of the Course or his deputy at the start line:
a) National & regional flag
b) Red Flag：Min 80 cm x 100 cm
This flag must be waved at the start line when it has been decided to stop a practice session or the race. The red flag may also be used by the Clerk of the Course or his deputy to close the circuit.
c) Black & White Chequered Flag：Min 80 cm x 100 cm
This flag must be waved. It signifies the end of a practice session or a race.
d) Black flag：displayed with a number board
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 Parc Fermé entrance. 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 Entrant concerned will immediately be informed of the decision.
e) Black flag with an orange disc：40cm in diameter；displayed with a number board
This flag should be used to inform the Driver concerned that his kart has mechanical problems likely to endanger himself or others and means that he must stop at the repair area on the next lap. When the mechanical problems have been rectified, the kart may rejoin the race.
f) Black and white flag divided diagonally：displayed with a number board
This flag should be shown only once and is a warning to the Driver concerned that he has been reported for unsportsmanlike behaviour.
These last three flags (in d, e & f) should be shown motionless and accompanied by a black board with a white number
which should be shown to the Driver of whose kart the number is displayed. These flags may also be displayed at places other than the start line should the Race Director or the Clerk of the Course deem this necessary.
Normally the decision to show the last two flags (in e & f) rests with the Race Director or the Clerk of the Course: however,it may be taken on request of the Stewards of the meeting in order to impose a sporting sanction.
(g) Blue and red flag (double diagonal)：displayed with a number board
The Driver concerned must stop before being lapped or also when he has been lapped.
This flag may only be used if it is provided forin the Championship, Cup or Trophy Sporting Regulations or in the Supplementary Regulations of the Event.
r) Green with yellow chevron flag：re-formation／re-form flag
Due to an unsuccessful start, the pack should reduce speed and revert to the starting grid position. A Driver could not regain his grid position in all cases after passing the Red Line. However, if the Clerk of the Course or the Race Director considers that a Driver has been immobilised as a result of another Driver’s mistake, the Clerk of the Course or the Race Director may stop the Formation Lap and start again the Starting Procedure on the basis of the original grid or allow the impeded Driver to regain his position. (2.20a(h))
⚠ Flag signals to be used at observation posts:
(h) Yellow flag：
This is a signal of danger and should be shown to Drivers in two ways with the following meanings:
– single waved: reduce your speed, do not overtake and be prepared to change direction. There is a hazard on the edge or on part of the track.
– double waved: reduceyour speed, do not overtake and be prepared to change direction or stop. There is a hazard wholly or partly blocking the track.
Yellow flags should normally be shown only at the marshals’ post immediately preceding the hazard.
Overtaking is not permitted between the first yellow flag and the green flag displayed after the incident.
(i) Yellow flag with red stripes：
This flag 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 4 laps unless the surface returns to normal beforehand. However, it is not necessary for marshals in the sector beyond the place where this flag is being shown to show a green flag.
(j) Blue flag：
This flag should normally be waved, as an indication to a Driver that he is about to be overtaken.
(k) White flag：
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.
(l) Green flag：
This flag 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.