(1) If in the course of investigating an alleged offense by a minor a petition has not been filed with the court, or if a petition has not been authorized, a law enforcement official or court intake worker may do 1 of the following:

    (a) Release the minor into the custody of his or her parent, guardian, or custodian and discontinue the investigation.

    (b) Divert the matter by making an agreement pursuant to section 5 with the minor and the minor's parent, guardian, or custodian to refer the minor to a person or public or private organization or agency that will assist the minor and the minor's family in resolving the problem that initiated the investigation.

    (c) File a petition with the court or authorize a petition that has been filed.

    (2) A minor may be diverted only as provided in subsection (1)(a) or (b) and subsection (3).

    (3) A minor accused or charged with an assaultive offense shall not be diverted.