When a ground assigned for the recusation of the judge of a district court having a single judge is his interest in the cause, the judge shall appoint a district judge of an adjoining district to try the motion to recuse. When any other ground is assigned for the recusation of such a district judge, he may appoint either a district judge of an adjoining district, or a lawyer domiciled in the judicial district who has the qualifications of a district judge, to try the motion to recuse.

The order of court appointing the judge ad hoc shall be entered on its minutes, and a certified copy of the order shall be sent to the judge ad hoc.