Iowa Code § 321.379: Violations.

A school board, individual, or organization shall not purchase, construct, or contract for use, to transport pupils to or from school, any school bus which does not comply with the minimum requirements of section 321.373 and any individual, or any member or officer of such board or organization who authorizes, the purchase, construction, or contract for any such bus not complying with these minimum requirements commits a simple misdemeanor.