Iowa Code § 468.297
Except as otherwise stipulated in this part the provisions and procedure set forth in subchapter I, parts 1 through 5, shall govern and apply to the formation, establishment, and conduct of every levee or drainage district extending into two or more counties, the petition therefor, the giving or publication or service of notice therein, the appointment and duties of all officers or appraisers or commissioners, the making or filing of waivers, reports, plats, profiles, recommendations, notices, contracts, and papers, the classification and apportionment and assessment of lands and all other property, the taking and hearing of appeals, the issuance and delivery of warrants, bonds and assessment certificates, the payment of taxes and assessments, the making of improvements, ditches, drains, settling basins, changes, enlargements, extensions, and repairs, the inclusion of lands, and the making or performance of every other matter or thing whatsoever relevant to or in any wise connected with such joint drainage or levee district, and the rights, privileges, and duties of all persons, landowners, officers, appellants, and courts.
Iowa Code § 468.297
89 Acts, ch 126, §2