R.I. Gen. Laws § 39-4-14: Formal investigation — Notice to utility.

If, after making a summary investigation, the division becomes satisfied that sufficient grounds exist to warrant a formal hearing being ordered as to the matters so investigated, it shall furnish to the public utility interested, a statement notifying the public utility of the matters under investigation. Ten (10) days after the notice has been given, the division may proceed to set a time and place for a hearing and investigation.