to 704.326, inclusive, to certain public utilities. The provisions of NRS 704.322 to 704.326, inclusive, do not apply to:
1. A public utility engaged in:
(a) Interstate commerce if 25 percent or more of the operating revenues of such public utility are derived from interstate commerce.
(b) The business of furnishing, for compensation, water or services for the disposal of sewage, or both, to persons within this State if the utility:
(1) Serves 15 persons or less; and
(2) Operates in a county whose population is 700,000 or more.
2. A competitive supplier.