Iowa Code § 321E.19

Upon complaint by local authorities or on the department’s own initiative and after notice and hearing before one or more members of the permit issuing body in the case of local authorities or the department of inspections and appeals for permits issued by the state department of transportation, permit privileges under this chapter may be suspended, changed, or revoked in whole or in part by the issuing authority for willful failure to comply with a provision of this chapter, a rule adopted under this chapter, or a term, condition, or limitation of the permit.

83 Acts, ch 116, §8; 89 Acts, ch 273, §2