(1) The hearing on the petition shall be before a judicial officer, sitting without a jury. Prior to the presentation of proof the judicial officer shall determine whether: (a) The petitioning minor understands the consequences of the petition regarding his or her legal rights and responsibilities; (b) a guardian ad litem should be appointed to investigate the allegations of the petition and file a report with the court.

(2) For the purposes of this section, the term "judicial officer" means: (a) A judge; (b) a superior court commissioner of a unified family court if the county operates a unified family court; or (c) any superior court commissioner if the county does not operate a unified family court. The term does not include a judge pro tempore.