Iowa Code Title IX. Local Government [Chs. 331-420] § 420.229. Delinquent city taxes--exclusive collection procedure

All general city taxes and special assessments which, under the provisions of sections 420.220 through 420.228, are not collectible by sale or are collectible by sale only in events or in a manner prescribed in this chapter shall respectively be deemed barred or barred as to collection in any other event or any other manner than so prescribed.