Iowa Code § 161A.46: Conduct of hearing.

At the hearing, the commissioners or their designees shall explain, in reasonable detail, the reasons why adoption, amendment, or repeal of the regulations is deemed necessary or advisable. Any landowner, or any occupant of land who would be affected by the regulations, shall be afforded an opportunity to be heard for or against the proposed regulations. At the conclusion of the hearing, the commissioners shall announce and enter of record their decision whether to adopt or modify the proposed regulations. Any modification must be approved by the division, which may at its discretion order the commissioners to republish the regulations and hold another hearing in the manner prescribed by this chapter.