Iowa Code § 814.19
The record and case shall be presented to the appellate court as provided in the rules of appellate procedure; the provisions of law in civil procedure relating to the filing of decisions and opinions of the appellate court shall apply in such cases.
Rules adopted by the supreme court are published in the compilation “Iowa Court Rules”
[C97, §5461; C24, 27, 31, 35, 39, §14009; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, §793.17; C79, 81, §814.19]