Number of driving lamps required or permitted.

Iowa Code § 321.419, under MOTOR VEHICLES AND LAW OF THE ROAD.

Iowa Code § 321.419

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 ] Referred to in §321.1 , 805.8A(3)(x) For applicable scheduled fine, see §805.8A , subsection 3 Lamps on parked vehicles, §321.395