How is a competitor notified about a Drive Through Penalty?

The proper notification method for a Drive Through Penalty is through the use of a black flag and a penalty board that displays the competitor's number at the Start/Finish area. This method is clearly established to ensure that the competitor receives immediate and clear communication about the penalty directly while on track. The black flag, which signifies that the driver must come into the pits, along with the penalty board that shows their specific racing number, serves to inform the competitor in a way that is difficult to miss during the race.

Using visual signals in this manner is crucial in motorsport, as it allows for quick identification and enforcement of rules without causing confusion among other competitors or teams. It also ensures that all competitors are treated fairly and consistently, as everyone can see the same signals, making it clear when penalties are being issued.