R.I. Gen. Laws § 39-4-5: Notice of hearing on complaint — Right to appear and summon witnesses.

The division shall give the public utility and the complainant, if any, ten (10) days’ notice of the time and place where and when the hearing and investigation will be held, and the matters considered and determined. Both the public utility and the complainant shall be entitled to be heard and appear by counsel, and shall have process to enforce the attendance of witnesses.