Versions of Iowa Code 554.1302 - Variation by agreement on LawServer 2023 Iowa Code 554.1302 – Variation by agreement 2022 Iowa Code 554.1302 – Variation by agreement 2020 Iowa Code 554.1302 – Variation by agreement 2018 Iowa Code 554.1302 – Variation by agreement 2016 Iowa Code 554.1302 – Variation by agreement 2014 Iowa Code 554.1302 – Variation by agreement. 2009 Iowa Code 554.1302 – Variation by agreement