A driver must not use, or allow to be used, a horn, or similar warning device, fitted to or in the driver's vehicle unless—
(a) it is necessary to use the horn, or warning device, to warn other road users or animals of the approach or position of the vehicle; or
(b) the horn, or warning device, is being used as part of an anti-theft device, or an alcohol interlock fitted to the vehicle.
Penalty: 1 penalty unit.
1 Driver's vehicle is defined in the dictionary. Road user is defined in rule 14. Alcohol interlock is defined in the Road Safety Act 1986 .
2 "Driver" includes a person in control of a vehicle—see the definition of "drive" in the dictionary.