Versions of Iowa Code 543D.18 - Standards of practice on LawServer 2023 Iowa Code 543D.18 – Standards of practice 2022 Iowa Code 543D.18 – Standards of practice 2020 Iowa Code 543D.18 – Standards of practice 2018 Iowa Code 543D.18 – Standards of practice 2016 Iowa Code 543D.18 – Standards of practice 2014 Iowa Code 543D.18 – Standards of practice. 2009 Iowa Code 543D.18 – Standards of practice