321.383  Exceptions — slow vehicles identified.
  1.  This chapter with respect to equipment on vehicles does not apply to implements of husbandry, road machinery, or bulk spreaders and other fertilizer and chemical equipment defined as special mobile equipment, except as made applicable in this section. However, the movement of implements of husbandry on a roadway is subject to safety rules adopted by the department of public safety. The safety rules shall prohibit the movement of any power unit towing more than one implement of husbandry, except implements of husbandry that are not self-propelled and are capable of being towed in tandem, from the manufacturer to the retail seller, from the retail seller to the farm purchaser, or from the manufacturer to the farm purchaser.
  2.  When operated on a highway in this state at a speed of thirty-five miles per hour or less, every farm tractor, or tractor with towed equipment, self-propelled implement of husbandry, road construction or maintenance vehicle, road grader, horse-drawn vehicle, or any other vehicle principally designed for use off the highway and any such tractor, implement, vehicle, or grader when manufactured for sale or sold at retail after December 31, 1971, shall be identified with a reflective device in accordance with the standards of the American society of agricultural engineers; however, this provision shall not apply to such vehicles when traveling in an escorted parade. If a person operating a vehicle drawn by a horse or mule objects to using a reflective device that complies with the standards of the American society of agricultural engineers for religious reasons, the vehicle may be identified by an alternative reflective device that is in compliance with rules adopted by the department of public safety. The reflective device or alternative reflective device shall be visible from the rear. A vehicle other than those specified in this section shall not display a reflective device or an alternative reflective device. On vehicles operating at speeds above thirty-five miles per hour, the reflective device or alternative reflective device shall be removed or hidden from view.
  3.  Garbage collection vehicles, when operated on the streets or highways of this state at speeds of thirty-five miles per hour or less, may display a reflective device that complies with the standards of the American society of agricultural engineers. At speeds in excess of thirty-five miles per hour the device shall not be visible.
  4.  Except as provided in subsection 5, any person who violates any provision of this section commits a simple misdemeanor punishable as a scheduled violation under section 805.8A, subsection 3.
  5.  A person who operates a self-propelled implement of husbandry at a speed which exceeds the limit of thirty-five miles per hour commits a simple misdemeanor punishable as a scheduled violation under section 805.8A, subsection 5.
[C39, §5033.03; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §321.383; 82 Acts, ch 1254, §2]
87 Acts, ch 186, §3; 96 Acts, ch 1152, §18; 97 Acts, ch 108, §20; 98 Acts, ch 1080, §3; 99 Acts, ch 102, §2; 99 Acts, ch 108, §5; 2001 Acts, ch 137, §5; 2010 Acts, ch 1061, §117; 2010 Acts, ch 1069, §96; 2010 Acts, ch 1190, §51; 2016 Acts, ch 1023, §1; 2020 Acts, ch 1074, §39, 40, 93; 2024 Acts, ch 1182, §16
Referred to in §321.1, 321.288, 321.398, 321.438, 805.8A(3)(g), 805.8A(5)(a)
For amber flashing light requirements, see §321.423, subsection 6
Subsections 1 and 2 amended