Iowa Code § 321.482: Violations — simple misdemeanors unless otherwise provided.

It is a simple misdemeanor for a person to do an act forbidden or to fail to perform an act required by this chapter unless the violation is by this chapter or other law of this state declared to be a serious or aggravated misdemeanor or a felony. Chapter 232 has no application in the prosecution of offenses committed in violation of this chapter which are simple misdemeanors.