Versions of Iowa Code 679B.21 - Powers of board on LawServer 2023 Iowa Code 679B.21 – Powers of board 2022 Iowa Code 679B.21 – Powers of board 2020 Iowa Code 679B.21 – Powers of board 2018 Iowa Code 679B.21 – Powers of board 2016 Iowa Code 679B.21 – Powers of board 2014 Iowa Code 679B.21 – Powers of board. 2009 Iowa Code 679B.21 – Powers of board