California Code, Vehicle Code - VEH § 24403

(a) A motor vehicle may be equipped with not more than two foglamps that may be used with, but may not be used in substitution of, headlamps.

(b) On a motor vehicle other than a motorcycle, the foglamps authorized under this section shall be mounted on the front at a height of not less than 12 inches nor more than 30 inches and aimed so that when the vehicle is not loaded none of the high-intensity portion of the light to the left of the center of the vehicle projects higher than a level of four inches below the level of the center of the lamp from which it comes, for a distance of 25 feet in front of the vehicle.

(c) On a motorcycle, the foglamps authorized under this section shall be mounted on the front at a height of not less than 12 inches nor more than 40 inches and aimed so that when the vehicle is not loaded none of the high-intensity portion of the light to the left of the center of the vehicle projects higher than a level of four inches below the level of the center of the lamp from which it comes, for a distance of 25 feet in front of the vehicle.