1. Upon receipt of a petition, the court may schedule a hearing to determine whether the petition should be granted.
2. At any hearing concerning the petition:
(a) The minor who is the subject of the petition shall personally attend.
(b) The court may hear and consider all competent, material and relevant evidence helpful in determining whether the petition should be granted, including, without limitation, oral and written testimony and reports, and such evidence may be received by the court and relied upon to the extent of its probative value.