Miss. Code § 77-3-5
Notwithstanding any other provision of law, and subject only to the limitations imposed in this chapter and in accordance with the provisions of this chapter, the Public Service Commission shall have exclusive original jurisdiction over the intrastate business and property of public utilities and, for purposes of clarification of the existing scope of said exclusive original jurisdiction, such exclusive original jurisdiction extends, but is not limited to: the establishment of retail rates; challenges, including customer complaints, to the amount of a retail rate or customer bill or whether such rate is just and reasonable; and challenges to the validity or accuracy of rates charged by a public utility, or to the accuracy or reliability of information submitted to the Public Service Commission by a public utility or other person in support of or in opposition to a proposed or approved rate, regardless of the legal theory upon which any such challenge is made. However, the commission shall not have jurisdiction over the production and gathering of natural gas or the sale of natural gas in or within the vicinity of the field where produced, or over the facilities and equipment utilized in any such operations, including, but not limited to, such facilities as separators, scrubbers and gasoline plants of all types. Further, the commission shall not have jurisdiction over the governance, management or other internal affairs of entities as described by paragraphs (b) and (c) below. Moreover, the commission shall not have jurisdiction to regulate the rates for the sales and/or distribution:
Miss. Code § 77-3-5