Iowa Code Title VIII. Transportation [Chs. 306-330B] § 322.24. Hearing--subpoenas

1. The state department of transportation and the department of inspections, appeals, and licensing may issue subpoenas to compel the attendance of witnesses and the production of documents, papers, books, records, and other evidence in any matter over which the respective department has jurisdiction, control, or supervision pertaining to this chapter.

2. If a person refuses to obey a subpoena, to give testimony, or to produce evidence as required, a judge of the district court of the state of Iowa in and for Polk county may, upon application and proof of the refusal, make an order awarding process of subpoena, or subpoena duces tecum, out of the court, for the witness to appear before the respective department, to give testimony, and to produce evidence as required. Upon filing the order in the office of the clerk of the district court, the clerk shall issue process of subpoena as directed, under the seal of the court, requiring the person to whom it is directed to appear at the time and place designated.