Under Michigan law, vehicles used for agricultural purposes that are manufactured on or after January 1, 2007 must comply with the following standards approved by the American National Standards Institute and the American Society of Agricultural Engineers:
- ASAE S276.6: Slow-Moving Vehicle Identification Emblem
- ASAE S279.12: Lighting and Marking of Agricultural Equipment on Highways
Such vehicles, referred to in the Michigan Vehicle Code as an "implement of husbandry," include farm tractors, vehicles designed to be drawn by a farm tractor or an animal, vehicles that directly harvest farm products, or vehicles that directly apply fertilizer, spray, or seeds to a farm field.
An agriculture vehicle manufactured after January 1, 2007 that doesn't comply with the standards listed previously may not be sold in Michigan.
State law also requires that agricultural vehicles made before January 1, 2007 and operated on a public roadway display lighted rear lamps plainly visible from 500 feet, or be accompanied by a vehicle that illuminates the agricultural vehicle with its headlights and displays lighted rear lamps visible from 500 feet.
Agricultural vehicles made before January 1, 2007 also must have at least one white front light and a red rear light visible from 500 feet during the period between 30 minutes after sunset and 30 minutes before sunrise, and at other times of insufficient light.
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