CA Veh Code § 25100 (2021)
2021 California Code|Vehicle Code - VEH|DIVISION 12 - EQUIPMENT OF VEHICLES|CHAPTER 2 - Lighting Equipment|ARTICLE 6 - Side and Fender Lighting Equipment|Section 25100.

25100.  (a) Except as provided in subdivisions (b) and (d), every vehicle 80 inches or more in overall width shall be equipped during darkness as follows:(1) At least one amber clearance lamp on each side mounted on a forward-facing portion of the vehicle and visible from the front and at least one red clearance lamp on each side mounted on a rearward-facing portion of the vehicle and visible from the rear.(2) At least one amber side-marker lamp on each side near the front and at least one red side-marker lamp on each side near the rear.(3) At least one amber side-marker lamp on each side at or near the center on trailers and semitrailers 30 feet or more in length and which are manufactured and first registered after January 1, 1962. Any such vehicle manufactured and first registered prior to January 1, 1962, may be so equipped.(4) At least one amber side-marker lamp mounted at approximate midpoint of housecars, motortrucks, and buses 30 or more feet in length and manufactured on or after January 1, 1969. Any such vehicle manufactured prior to January 1, 1969, may be so equipped.(5) Combination clearance and side-marker lamps mounted as side-marker lamps and meeting the visibility requirements for both types of lamps may be used in lieu of required individual clearance or side-marker lamps.(b) The following vehicles when 80 inches or more in overall width and not equipped as provided in subdivision (a) shall be equipped during darkness as follows:(1) Truck tractors shall be equipped with at least one amber clearance lamp on each side on the front of the cab or sleeper and may be equipped with amber side-marker lamps on each side.(2) Truck tractors manufactured on or after January 1, 1969, shall be equipped with one amber side-marker lamp on each side near the front.(3) Pole or pipe dollies, or logging dollies, shall be equipped with at least one combination clearance and side-marker lamp on each side showing red to the front, side, and rear.(4) Vehicles, except truck tractors, which are 80 inches or more in width over a distance not exceeding three feet from front to rear shall be equipped with at least one amber combination clearance lamp and side-marker lamp on each side visible from the front, side, and rear if the projection is near the front of the vehicle and at least one red lamp if the projection is near the rear of the vehicle.(5) Towing motor vehicles engaged in driveaway-towaway operations shall be equipped with at least one amber clearance lamp at each side on the front and at least one amber side-marker lamp on each side near the front.(6) Towed motor vehicles engaged in driveaway-towaway operations shall be equipped with at least one amber side-marker lamp on each side of intermediate vehicles, and the rearmost vehicle shall be equipped with at least one red side-marker lamp on each side and at least one red clearance lamp on each side on the rear.(7) Trailers and semitrailers designed for transporting single boats in a cradle-type mounting and for launching the boat from the rear of the trailer need not be equipped with front and rear clearance lamps provided amber clearance lamps showing to the front and red clearance lamps showing to the rear are located on each side at or near the midpoint between the front and rear of the trailer to indicate the extreme width of the trailer.(c) Loads extending beyond the side of a vehicle where the overall width of the vehicle and load is 80 inches or more shall be equipped with an amber combination clearance and side-marker lamp on the side at the front and a red combination clearance and side-marker lamp on the side at the rear. In lieu of the foregoing requirement, projecting loads not exceeding three feet from front to rear at the extreme width shall be equipped with at least one amber combination clearance and side-marker lamp on the side visible from the front, side, and rear if the projection is near the front of the vehicle and at least one red lamp if the projection is near the rear of the vehicle.(d) Clearance and side-marker lamps are not required on auxiliary dollies or on passenger vehicles other than a housecar.(e) Clearance lamps shall be visible from all distances between 500 feet and 50 feet to the front or rear of the vehicle, and side-marker lamps shall be visible from all distances between 500 feet and 50 feet to the side of the vehicle.(f) Clearance lamps shall, so far as is practicable, be mounted to indicate the extreme width of the vehicle. Side-marker lamps shall be mounted not lower than 15 inches on vehicles manufactured on and after January 1, 1968. Combination clearance and side-marker lamps required on loads shall be mounted so the lenses project to the outer extremity of the vehicle or load.(Amended by Stats. 1981, Ch. 714, Sec. 446.)