As used in this chapter, "retail energy service" means energy service furnished by an energy utility to a customer for ultimate consumption, including energy service by a general district corporation to a local district corporation within the meaning of IC 8-1-13-23. The term does not include wholesale energy service furnished by an energy utility for resale (other than energy service by a general district corporation to a local district corporation) to another energy utility, a cooperatively owned electric utility, or a municipally owned electric utility.
IC 8-1-2.5-3