224Using horns and similar warning devices

224 Using horns and similar warning devices 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 (b) the horn, or warning device, is being used as part of an anti- theft device, or an alcohol interlock device, fitted to the 1 Driver's vehicle is defined in the dictionary, road user is defined in rule 14 and alcohol interlock device is defined in rule 221.