Road Traffic (Light Vehicle Standards) Rules 2018
Div 13Fog lights
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Division 13—Fog lights 101—Front fog lights (1) A pair of front fog lights may be fitted to a motor vehicle with 4 or more wheels. (2) A pair of front fog lights, or a single front fog light, may be fitted to a motor bike or motor trike. (3) A pair of front fog lights fitted to a motor vehicle with 4 or more wheels must have the centre of each light not over 400 millimetres from the nearer side of the vehicle unless the centres of the lights are at least 600 millimetres apart. (4) If the top of the front fog light is higher than the top of any low‑beam headlight on the vehicle, the centre of the fog light must not be higher than the centre of the low‑beam headlight. (5) A front fog light must— (a) when on— (i) project white or yellow light in front of the vehicle; and (ii) be a low‑beam light; and (b) be able to be operated independently of any headlight; and (c) be fitted so the light from it does not reflect off the vehicle into the driver's eyes. 102—Rear fog lights rear fog light means a light used on a vehicle to make the vehicle more easily visible, from the rear, in dense fog. (2) A vehicle may have fitted to its rear— (a) a pair of rear fog lights; or (b) 1 rear fog light fitted on, or to the right, of the centre of the vehicle. (3) Subrule (2)(b) applies to a motor bike with an attached sidecar as if the sidecar were not attached. (4) A rear fog light must— (a) have its centre— (i) not over 1.5 metres above ground level; and (ii) at least 100 millimetres from the centre of a brake light; and (b) when on, project red light behind the vehicle; and (c) not use over 27 watts of power; and (d) be wired to a visible device in the vehicle that tells the driver that the rear fog light is operating.