Iowa Code § 357F.2
1. The board shall, on the petition of twenty-five percent of the resident property owners in a proposed district if the assessed valuation of the property owned by the petitioners represents at least twenty-five percent of the total assessed value of the proposed district, hold a public hearing concerning the establishment of a proposed district. The petition shall include a statement containing the following information:
92 Acts, ch 1226, §3
Referred to in §357F.4