This amendment to the Electricity Industry Participation Code 2010 comes into force on 21 December 2021.

The amendment inserts new provisions into the Electricity Industry Participation Code 2010 ("Code") to re-introduce the regime for 'automatic under-frequency load shedding' relays ("AUFLS"). References to extended reserve in the Code are deleted. The amendment implements the Authority's decision to transition the AUFLS provision in the North Island to the system operator's 4-block scheme with rate of-change-of-frequency ("RoCoF") trip settings on the fourth AUFLS block. Planning for the scheme will require that North Island connected asset owners submit their current 2-block AUFLS load data to the system operator, and then subsequently submit load data annually for periodical review by the system operator. The aim is to provide the North Island with a reliable and efficient electricity system to manage the challenges posed by the changing power system.