Miss. Code § 77-11-101
The Mississippi Public Service Commission is hereby vested with authority to provide for standards of safety and inspection of gas districts, or municipally owned and/or operated transmission or distribution of natural, artificial, or mixed natural and artificial gas, by means of transportation, transmission or distribution facilities and equipment municipally owned and/or operated by said municipality or gas district. To the maximum extent permissible under the Natural Gas Pipeline Safety Act of 1968, the commission is also hereby vested with authority to provide for standards of safety and inspection of facilities owned and/or operated as private pipelines, private pipeline carriers or private pipeline carriers by contract which are not engaged in the transmission, sale, sale for resale or distribution of gas to the public for compensation and which are not therefore subject to the general jurisdiction of the commission as public utilities, which said facilities are used for the intrastate transmission or distribution of natural, artificial and mixed natural and artificial gas by means of intrastate transportation, transmission or distribution facilities or equipment owned and/or operated by any such pipeline.
Miss. Code § 77-11-101