(1) As used in this section:
(a) "new service area" means any subdivision or group of newly constructed or newly installed dwellings (including mobile homes) or commercial buildings which, when occupied, will generate at least five contracts for the supply of electricity; and
(b) "lines used for the distribution of electricity" means all the distribution lines in the new service area through which electricity passes before it is utilized by the consumer and the consumer's dwelling or place of business.
(2) A firm, agency, or person exercising the rights conferred by 69-4-101 shall install underground all lines used for the distribution of electricity in a new service area when technically and economically feasible.
(3) The commission may make rules to implement this section.