Sec. 4. (a) As used in this chapter, "water utility" means:
(1) a public utility (as defined in IC 8-1-2-1(a)); or
(2) a municipally owned utility (as defined in IC 8-1-2-1(h));
that provides water service to the public, and that is under the commission's authority with respect to rates and charges.
(b) For purposes of this chapter, a municipally owned utility includes a utility company owned, operated, or held in trust by a consolidated city.