Iowa Constitution Art. V, § 10. Judicial districts

The general assembly may reorganize the judicial districts and increase or diminish the number of districts, or the number of judges of the said court, and may increase the number of judges of the supreme court; but such increase or diminution shall not be more than one district, or one judge of either court, at any one session; and no reorganization of the districts, or diminution of the number of judges, shall have the effect of removing a judge from office. Such reorganization of the districts, or any change in the boundaries thereof, or increase or diminution of the number of judges, shall take place every four years thereafter, if necessary, and at no other time.

At any regular session of the general assembly the state may be divided into the necessary judicial districts for district court purposes, or the said districts may be reorganized and the number of the districts and the judges of said courts increased or diminished; but no reorganization of the districts or diminution of the judges shall have the effect of removing a judge from office.