Iowa Code § 384.57
The city may contract to pay not to exceed ninety-five percent of the engineer's estimated value of the acceptable work completed during the month to the contractor at the end of each month. Payment may be made in warrants drawn on any funds from which payment for the work may be made. If such funds are depleted, anticipatory warrants may be issued bearing a rate of interest not exceeding that permitted by chapter 74A, which do not constitute a violation of section 384.10, even if the collection of taxes or special assessments or income from the sale of bonds applicable to the public improvement is after the end of the fiscal year in which the warrants are issued. If the city arranges for the private sale of anticipatory warrants, they may be sold and the proceeds used to pay the contractor. Anticipatory warrants may also be used to pay other persons furnishing services constituting a part of the cost of the public improvement. The provisions of this section and section 384.58 shall not apply if the city has entered into a contract with the federal government or accepted a federal grant which is governed by federal laws or rules that are contrary to this section and section 384.58.
Iowa Code § 384.57
Referred to in §357E.11A, 384.58