On 3 October 2025, Transgrid submitted an application seeking an AER determination on whether the expenditure for proposed system security network support (SSNS) payments, and methodologies for such payments, as set out in a draft contract will likely be prudent and efficient. 

Transgrid’s application is the first SSNS payment contract review application received by the AER. We will assess the application for consistency against the operating expenditure objectives and criteria in the National Electricity Rules, in accordance with our System security network support payment guideline.

We have invited energy consumers and other interested parties to make submissions on Transgrid’s system security contract review application by close of business 10 November 2025.