; MAIFI In accordance with IEEE 1366, the term Momentary Average Interruption Frequency Index or MAIFI means the average number of momentary interruptions experienced by customers per year. (7) Momentary interruption (A) In general In accordance with IEEE 1366, the term momentary interruption means a brief loss of power, as determined by the applicable electric utility, subject to subparagraph (B). (B) Exclusion The term momentary interruption does not include a loss of power lasting more than 5 minutes. (8) Reliability The term reliability , with respect to the electric grid, means the ability of the electric grid or the components of the electric grid to withstand instability, uncontrolled events, cascading failures, or unanticipated loss of system components. (9) Resilience The term resilience , with respect to the electric grid, means the ability of the electric grid or the components of the electric grid to adapt to changing conditions and withstand and rapidly recover from disruptions, including disruptions caused by extreme weather conditions or emerging threats. (10) Resource adequacy The term resource adequacy means the adequate supply and provision of electricity from various electric generation resources to meet projected electricity demands in a service area. (11) Secretary The term Secretary means the Secretary of Energy. (12) Sustained interruption In accordance with IEEE 1366, the term sustained interruption means an interruption in power service lasting more than 5 minutes. (13) System Average Interruption Duration Index; SAIDI In accordance with IEEE 1366, the term System Average Interruption Duration Index or SAIDI means the average number of minutes of sustained interruption per customer per year. (14) System Average Interruption Frequency Index; SAIFI In accordance with IEEE 1366, the term System Average Interruption Frequency Index or SAIFI means the average number of sustained interruptions per customer per year. (b) Disadvantaged community; low-Income community