Miss. Code § 21-27-23
Any municipality may:
Money may be borrowed and bonds issued by any municipality of the State of Mississippi, as defined in Section 21-27-11, to acquire or improve any waterworks system, water supply system, sewerage system, sewage disposal system, garbage disposal system, rubbish disposal system or incinerators, gas producing system, gas generating system, gas transmission system, or gas distribution system, electric generating, transmission or distribution system, railroad transportation system for passengers and freight, or motor vehicle transportation system, including any combination of any or all of those systems into one (1) system, within or without the corporate limits thereof, for the purpose of supplying the municipality and the persons and corporations, both public and private, whether within or without its corporate limits, with the services and facilities afforded by the system, provided that water, electric energy, or gas afforded by any system or systems may be supplied to such ultimate consumers thereof by sale thereof to the owners or operators of a distribution system for resale to the public. Any municipality which shall borrow money and issue revenue bonds to provide funds with which to acquire a gas transmission system, if necessary in order to reach and obtain a source of supply of gas for the municipality, may extend or construct its gas transmission line into an adjoining state, and may use and expend part of the proceeds of such issue of revenue bonds for the purpose.
A municipality may authorize a municipally owned utility to make early payment of the utility's bills to its electricity suppliers which offer early payment discounts to the municipally owned utility. The municipality may immediately refund to a customer of the municipally owned utility his or her deposit for municipal utility services after the municipal utility has determined that payment for all services and any other obligations which the customer may have incurred in regard to the municipal utility has been made.
If the revenues of any previously existing system being merged into a combined system are subject to a prior lien, the revenues and the expenses of any previously existing system shall be accounted for separately to the extent necessary to satisfy the covenants relating to the prior lien for so long as the indebtedness secured by the revenues shall remain outstanding. Only surplus revenues remaining after the satisfaction of all covenants relating to the outstanding indebtedness may be pledged to the retirement of any indebtedness to be secured by the revenues of a combined system. The existence of the outstanding indebtedness shall not, in and of itself, prevent the combining of systems as herein provided, so long as the prior lien on the revenues of any previously existing system is fully satisfied from the revenues of the previously existing system.
Miss. Code § 21-27-23