Iowa Code § 489.803: Proper plaintiff.

1. Except as otherwise provided in subsection 2, a derivative action under section 489.802 may be maintained only by a person that is a member at the time the action is commenced and remains a member while the action continues.

2. If the sole plaintiff in a derivative action dies while the action is pending, the court may permit another member of the limited liability company to be substituted as plaintiff.