(a) Except as provided in § 7-82-302, each county, utility district, municipality or other public agency conducting any utility service specifically including waterworks, water plants and water distribution systems and sewage collection and treatment systems is authorized to extend such services beyond the boundaries of such county, utility district, municipality or public agency to customers desiring such service.(b) Any such county, utility district, municipality or public utility agency shall establish proper charges for the services so rendered so that any such outside service is self-supporting.(c) No such county, utility district, municipality or public utility agency shall extend its services into sections of roads or streets already occupied by other public agencies rendering the same service, so long as such other public agency continues to render such service.Acts 1949, ch. 23, §§ 1-3; C. Supp. 1950, § 3695.47 (Williams, §§ 3695.45-3695.47); Acts 1959, ch. 166, § 3; T.C.A. (orig. ed.), § 6-604.