321.403  Auxiliary driving lamps.
  Any motor vehicle may be equipped with not to exceed three auxiliary driving lamps mounted on the front at a height not less than twelve inches nor more than forty-two inches above the level surface upon which the vehicle stands, and every such auxiliary driving lamp or lamps shall meet the requirements and limitations set forth in this chapter.
[C24, 27, 31, 35, §5050; C39, §5034.12; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §321.403]

For applicable scheduled fine, see §805.8A, subsection 3