Iowa · Iowa Code — Motor Vehicles (Ch. 321, 321J)
Iowa Code (Motor Veh.) § 321.385A: LIGHTINGEQUIPMENT Exceptiontorequirementsof§321.384–321.423forimplementsofhusbandryoperated asspecialmobileequipmentduringdaylighthours,see§321.1(32) 321.384Whenlightedlampsrequired
What this law says, in plain English
Motor vehicles must display lighted headlamps from sunset to sunrise and during poor visibility conditions like fog or rain. All-terrain vehicles must display headlamps at all times on highways.
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