Lights, mirrors, or devices which are required to be mounted upon a vehicle under this code may extend beyond the permissible width of the vehicle to a distance not exceeding 10 inches on each side of the vehicle.
Cal. Veh. Code § 35109
Width
Amended by Stats. 1983, Ch. 145, Sec. 7
Official source: California Legislative Information. Reproduced from public-domain California statutes; confirm against the official source for the current text. Not legal advice.