Effective January 1, 2022, Senate File 2378 repeals the requirement for public corporations to divide their board of directors into three groups, serving staggered terms. Effective January 1, 2019, corporations affected by this repeal are required to file an amendment to their articles of incorporation.
https://www.legis.iowa.gov/docs/publications/iactc/87.2/CH1015.pdf
Iowa – Inspection by Shareholders