Iowa Code § 684A.8

The supreme court or the court of appeals, on its own motion or the motion of a party, may order certification of questions of law to the highest court of another state when it appears to the certifying court that there are involved in a proceeding before the court questions of law of the receiving state which may be determinative of the cause then pending in the certifying court and it appears to the certifying court that there are no controlling precedents in the decisions of the highest court or intermediate appellate courts of the receiving state.