Sec. 15. (a) As used in this chapter, "sustained service interruption" means a service interruption that is at least five (5) minutes in duration. (b) The term does not include the following, regardless of duration: (1) A planned service interruption that is: (A) initiated by an electricity supplier to perform scheduled activities, such as work related to: (i) system or facilities maintenance or upgrades; (ii) infrastructure improvements; or (iii) new construction; and (B) communicated to customers in advance. (2) A curtailment or interruption of service to a customer receiving service under an interruptible service tariff to the extent that the curtailment or interruption of service occurs in accordance with the customer's service agreement. As added by P.L.36-2026, SEC.10.