Sec. 4. (a) As used in this chapter, "electricity supplier" means a public utility (as defined in IC 8-1-2-1) that furnishes retail electric service to customers in Indiana.
(b) The term does not include a utility that is:
(1) a municipally owned utility (as defined in IC 8-1-2-1(h));
(2) a corporation organized under IC 8-1-13; or
(3) a corporation organized under IC 23-17 that is an electric cooperative and that has at least one (1) member that is a corporation organized under IC 8-1-13.