The National Highway Traffic Safety Administration (NHTSA) issued a final rule to clarify that no horn marking is required unless the horn control is situated in a location other than in the middle of the steering wheel. In this case, the location would need to be identified with a specified horn symbol in a color that stands out clearly against the background.
The NHTSA believes the motoring public expects the horn to be in the center, thus the driver only needs to be alerted when it is in a different location. Motor vehicle controls, telltales and symbols (including the horn symbol) are regulated under Federal Motor Vehicle Safety Standard No. 101.
For additional information, contact Stuart Gosswein.