Versions of Iowa Code 512B.21A - Required reserves on LawServer 2023 Iowa Code 512B.21A – Required reserves 2022 Iowa Code 512B.21A – Required reserves 2020 Iowa Code 512B.21A – Required reserves 2018 Iowa Code 512B.21A – Required reserves 2016 Iowa Code 512B.21A – Required reserves 2014 Iowa Code 512B.21A – Required reserves. 2009 Iowa Code 512B.21A – Required reserves