Length Mm From 1300 To 1800 - Legislative Decree "with The Entry Into Force Of The Legislative Decree Of 30/4/92 N. 285 "Highway Code", From 1 January 1993 All Motor Vehicles, Including Trailers, Will Have The Obligation, As Required By Art. 153 Of The Aforementioned Decree, To Install The Rear Fog Light. Drivers Must Operate This Warning In The Event Of Fog With Visibility Of Less Than 50 Meters ".