321.397  Lamps on bicycles.
  Every bicycle shall be equipped with a lamp on the front exhibiting a white light, at the times specified in section 321.384, visible from a distance of at least three hundred feet to the front and with a lamp on the rear exhibiting a red light visible from a distance of three hundred feet to the rear; except that a red reflector may be used in lieu of a rear light. A peace officer riding a police bicycle is not required to use either front or rear lamps if duty so requires.
[C31, 35, §5045-d1; C39, §5034.06; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §321.397]
97 Acts, ch 71, §3; 97 Acts, ch 108, §21

For applicable scheduled fine, see §805.8A, subsection 9