If no proceedings for the child's commitment under chapter 6, part 5 of this title are pending, the hearing to determine the necessity of administering electroconvulsive or other convulsive therapy shall be convened in the juvenile court where the child resides, was committed to state custody, or may be found upon petition of the child, the child's parent, the legal guardian, a mental health professional, hospital, or treatment resource seeking authorization to administer the therapy. The petition shall be verified and shall state the nature of the therapy for which authorization is sought, and the facts upon which the petitioner relies to support the claim that the therapy is necessary for the child's health or safety. The court shall, upon receipt of the petition, appoint counsel to defend against the petition, and the petition shall be served personally upon both the child and the child's attorney.