On 28 November 2025, the AER determined under rule 6A.6.6A(a) that the system security network support payments and payment methodologies set out in the draft contract between Transgrid and Snowy Hydro will likely result in expenditure that is prudent and efficient.

By this we mean they are consistent with the opex objectives, criteria and factors, and relevant network support pass through factors.

Due to confidentiality requirements, some elements of the application and the AER’s decision are redacted to protect confidential and commercial-in-confidence information related to specific terms of the draft contract.