Article 99 Position and height lighting
1. Any vehicle travelling between sunset and sunrise or under the conditions referred to in article 106 and in passing through tunnels, underpasses or sections of roads affected by the signal “Tunnel” (S-5) must have headlights on and, if the width of the vehicle exceeds 2.10 metres, also height lighting.
2. Driving without lighting in situations of reduced visibility shall be considered a serious infringement, as explained in article 65.4.e) of the articulated text.