(a) The rates, services, and practices relating to the exploration, manufacture, development, storage, production, transmission, and sale by the authority of gas as authorized by this article shall not be subject to the provisions of the Georgia Public Service Commission law nor to regulation.

(b) The provisions of this article do not, and are not intended to, increase or diminish the authority and jurisdiction of the Public Service Commission with respect to the distribution, sale, or transmission of gas by any county, municipal corporation, or other political subdivision of this state.