Does the horn button must be on steering wheel?

While the horn button is commonly found on the steering wheel for convenient and quick access while driving, it is not mandatory. There are some vehicles, particularly older models or specialized vehicles, where the horn button may be located elsewhere, such as on the dashboard, gear shift lever, or stalk near the steering wheel. Placing the horn button on the steering wheel has become a standard practice for most vehicles to ensure it can be accessed easily and safely during driving.