Versions of Iowa Code 421B.4 - Combination sales on LawServer 2023 Iowa Code 421B.4 – Combination sales 2022 Iowa Code 421B.4 – Combination sales 2020 Iowa Code 421B.4 – Combination sales 2018 Iowa Code 421B.4 – Combination sales 2016 Iowa Code 421B.4 – Combination sales 2014 Iowa Code 421B.4 – Combination sales. 2009 Iowa Code 421B.4 – Combination sales