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. The safety rules shall prohibit the movement of any power unit towing more than one implement of husbandry 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. 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.
Any person who violates any provision of this section shall be fined as provided in section 805.8, subsection 2, paragraph "d".
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