1. A petition alleging delinquency under this chapter must be reviewed by the director, the court, or other person designated by the director and authorized by the court to determine whether the filing of the petition is in the best interest of the public and the child.

2. The state's attorney shall prepare, file, and serve a petition alleging delinquent conduct on the parties. The juvenile court shall conduct an inquiry into and provide the last known address of the parents or legal guardian of the child in the referral to the state's attorney.

3. A petition alleging delinquent conduct may not include the adult class level of the offense unless the offense level is a necessary element of the delinquent conduct.