Iowa Admin. Code r. 761-524.18
A person whose application for a motor carrier permit or certificate has been denied for a reason other than noncompliance with insurance requirements or whose motor carrier permit or certificate has been suspended or revoked for a reason other than noncompliance with insurance requirements may contest the decision in accordance with Iowa Code chapter 17A and 761-Chapter 13. The request for a hearing shall be submitted in writing to the director of the vehicle and motor carrier services bureau. The request shall include, as applicable, the motor carrier's name, permit or certificate number, complete address and telephone number. The request must be submitted within 20 days after the date of the notice of suspension, revocation or denial.
Iowa Admin. Code r. 761-524.18