The AER has published a guidance note to provide information on our assessment of the market impact component (MIC) parameters for applying version 5 of the Service Target Performance Incentive Scheme (STPIS) to transmission network service providers (TNSPs). This guidance note has been prepared in accordance with clause 6A.2.3 of the National Electricity Rules.

The purpose of this guidance note is to provide clarification on:

• the data period used in calculating the MIC performance target
• how MIC exclusions 1 and 6 are to be applied to certain MIC counts in the scheme. 

This guidance note applies to TNSPs that are subject to version 5 of the scheme and are required to propose a MIC performance target in their revenue proposal.