Consultation on ST PASA Replacement Project - Reserve Level Declaration Guidelines

AEMO is consulting on the ST PASA replacement project in two stages, Consultation 1 and Consultation 2, to ensure relevant parties have adequate opportunity to engage on the extensive changes to the ST PASA process and procedures.

Consultation 1 was completed in October 2025 with development of a new ST PASA Procedure and minor amendments to the Reliability Standard Implementation Guideline.

This consultation (Consultation 2) considers the reserve level declaration guidelines and the proposed application of uncertainty measures to load forecasting. Consequential amendments to the supporting procedures will also be a part of Consultation 2.

Scope

This consultation sets out AEMO's proposal on inputs, processes and outputs to the ST PASA engine for the purpose of declaring reserve conditions under NER 4.8.4.

AEMO has established the ST PASA Replacement Project under NEM Reform to implement system and procedure changes collaboratively with industry.