321.419  Number of driving lamps required or permitted.
  At all times specified in section 321.384 at least two lighted lamps, except where one only is permitted, shall be displayed, one on each side at the front of every motor vehicle except when such vehicle is parked subject to the regulations governing lights on parked vehicles.
[C39, §5034.28; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §321.419]
For applicable scheduled fine, see §805.8A, subsection 3