Iowa Code § 419.9
Prior to the issuance of any bonds under authority of this chapter, the municipality shall conduct a public hearing on the proposal to issue said bonds. Notice of intention to issue the bonds, specifying the amount and purpose thereof and the time and place of hearing, shall be published at least once not less than fifteen days prior to the date fixed for the hearing in a newspaper published and having a general circulation within the municipality. If there is no newspaper published therein, the notice shall be published in a newspaper published in the county and having a general circulation in the municipality. At the time and place fixed for the public hearing the governing body of the municipality shall give all local residents who appear at the hearing an opportunity to express their views for or against the proposal to issue the bonds and at the hearing, or any adjournment thereof, shall adopt a resolution determining whether or not to proceed with the issuance of the bonds.
Iowa Code § 419.9