Miss. Code § 77-11-105
The public service commission shall have the right, power and authority to provide and make certification, reports and information to the secretary of the United States Department of Transportation; to enter into agreements with said secretary to carry out the purposes of this article; to enforce federal safety standards in the State of Mississippi in lieu of enforcement by the said department of transportation; and to exercise regulatory jurisdiction over the safety of pipeline systems owned and/or operated by gas districts or municipalities and said private pipelines, private pipeline carriers and private pipeline carriers by contract in the transportation of gas as permitted by the Natural Gas Pipeline Safety Act of 1968.
Miss. Code § 77-11-105