If the articles of incorporation or action by the board of directors pursuant to section 490.602 authorize dividing the shares into classes or series, the articles of incorporation may also authorize the election of all or a specified number of directors by the holders of one or more authorized classes or series of shares. A class or series, or multiple classes or series, of shares entitled to elect one or more directors is a separate voting group for purposes of the election of directors.
Iowa Code § 490.804
89 Acts, ch 288, §75; 2021 Acts, ch 165, § 90, 230