R.I. Gen. Laws § 39-3-7

The commission shall periodically, after having given each public utility concerned reasonable notice and an opportunity to be heard, determine and fix by order the standard amount, quality, pressure, initial voltage, and character of each kind of product or service to be furnished or rendered by each public utility, and standard condition or conditions pertaining to furnishing or rendering the same, and thereafter each public utility shall furnish and render the same accordingly. The hearing prescribed by this section may be held simultaneously with the hearing prescribed by § 39-3-11.