Iowa Code § 357A.3: Hearing after filing with auditor.

When a petition for incorporation and organization of a district is filed with the auditor, the auditor shall so inform the supervisors who shall fix a time for a hearing thereon, not less than fifteen nor more than thirty days after the filing of the petition. The auditor shall prepare a notice as hereinafter required, which shall at least seven days before the date fixed for the hearing on the petition:

1. Be published in a newspaper of general circulation in the area to be incorporated.

2. Be transmitted, together with a copy of the original petition, to the supervisors.