The commission may, in addition to the hearings specifically provided for by this chapter, conduct such other hearings as may be deemed necessary in the administration of the powers and duties conferred upon it by this title.

The commission shall fix the time and place of hearings and shall serve notice thereof, not less than twenty (20) days before the time set for such hearings, unless the commission shall find that public convenience or necessity requires that such hearings be held at an earlier date. The commission may dismiss any complaint without a hearing if in its opinion a hearing is not necessary in the public interest or for the protection of substantial rights. Notice of all such hearings shall be given the persons interested therein by mailing such notice to each public utility which may be affected by any order resulting therefrom and by publication in a newspaper of general circulation published in Jackson, Mississippi, and, in a proceeding for a facility certificate or an area certificate, by publication in a newspaper of general circulation in the county or counties where the facility or area is located. In addition to any other notice requirements prescribed in this section, notice of a hearing regarding a major change in rates and schedules, as defined in Section 77-3-37(8), by a public utility of the type defined in Section 77-3-3(d)(iv) shall be published in a newspaper having general circulation in an area where service is being provided by the public utility.

At the time fixed for any hearing before the commission, or the time to which the same may have been continued, the complainant and the person complained of shall be entitled in person or by attorney to be heard and to introduce evidence.