The minor and his parents, guardian or custodian are entitled to file with the court a motion for a hearing by a judge of the juvenile court within fifteen days after receiving notice of the findings of the commissioner. In cases in which the juvenile court has jurisdiction pursuant to subdivision (1) of subsection 1 of section 211.031, the juvenile officer, in addition to the parties listed above, is also entitled to file with the court a motion for a hearing by a judge of the juvenile court within fifteen days after receiving notice of the findings of the commissioner. The judge shall promptly rule on such motion and, in his discretion, may either sustain or deny the motion, and if the motion is sustained, the judge shall set a date for a hearing. If the motion is denied, or if no such motion is filed, the findings and recommendations of the commissioner shall become the decree of the court when adopted and confirmed by an order of the judge. The final order of the court shall, in any event, be proof of such adoption and confirmation and also of the fact that the matter was duly referred to the commissioner.