Transpower IRIS provisions

This page contains information on our review of the Transpower IRIS provisions being carried out as part of the input methodologies review.

The Commission is reviewing the input methodologies (IMs), which it is required to do within 7 years of setting them. We published our final decision papers on the IM review on 20 December 2016.

We have made a decision to separate our review of the Transpower IRIS IMs from the final decisions on the IM review. The separate indicative timeline for this review is set out below.