69-8-201. Public utility -- customer electricity supply service options and requirements -- exemption. (1) (a) Except as provided in subsections (1)(b) and (1)(c), a retail customer that has an individual load with an average monthly demand of greater than or equal to 5,000 kilowatts and that is not purchasing electricity supply service from a public utility on October 1, 2007, may not purchase electricity supply service from a public utility.

(b) A retail customer referred to in subsection (1)(a) may request electricity supply service from the public utility, and the public utility shall provide electricity supply service if the retail customer demonstrates that the provision of electricity supply service to the retail customer will not adversely impact the public utility's other customers over the long term as determined by the commission.

(c) If a public utility provides electricity supply service to a retail customer as provided in subsection (1)(b), that service is regulated by the commission and the customer may not, at a later date, purchase electricity supply service from another provider of electricity supply service.

(2) (a) A retail customer that has an individual load with an average monthly demand of less than 5,000 kilowatts that is not purchasing electricity from a public utility on October 1, 2007, may continue to purchase electricity from an electricity supplier. The retail customer may subsequently purchase electricity from a public utility subject to commission rule or order, but the customer may not, at a later date, choose to purchase electricity from another source.

(b) A retail customer that has an individual load with an average monthly demand of less than 5,000 kilowatts and that is currently purchasing electricity from a public utility may not choose to purchase electricity from another source after October 1, 2007.

(3) Nothing in this section affects a retail customer's rights and obligations with respect to net metering, cogeneration, self-generation, or ancillary sales of electricity related to deviations from scheduled energy deliveries from nonutility suppliers, as may be provided for in law, commission rule or order, or a tariff approved by the public service commission or the federal energy regulatory commission.

(4) (a) Except as provided in 69-5-101, 69-5-102, 69-5-104(2), 69-5-105 through 69-5-112, 69-8-402, 69-8-421, and subsection (4)(b) of this section, a public utility currently doing business in Montana as part of a single integrated multistate operation, no portion of which lies within the basin of the Columbia River, is exempt from the requirements of this chapter.

(b) To the extent that a public utility described in subsection (4)(a) becomes the successor in interest of another public utility that has restructured in accordance with this chapter before October 1, 2007, it is subject to the requirements of this chapter with respect to the service area of the acquired public utility.