Background
The Australian Energy Market Operator (AEMO) is required to undertake a review of the Western Australian Gas Bulletin Board (GBB) Zones at least once every five years. The last review under sub-rule 82(10) of the GSI Rules was undertaken in 2020. AEMO has commenced the 2025 GBB Zones review.
AEMO developed a draft report which presented the preliminary outcomes of the 2025 GBB Zones review and what changes may be required to the current Zones, and whether the information presented by Zones promotes the Gas Services Information objectives (GSI Objectives).
AEMO sought feedback from stakeholders on the preliminary findings of this review in accordance with sub-rule 82(11) of the GSI Rules before it was finalised.
Public Consultation and Submissions
To help inform the final report and test the preliminary findings, AEMO invited all interested parties to submit their views on the appropriateness of the current GBB Zones List, and any reasons why changes to the current Zones may be required. Stakeholders are asked to consider the following questions:
- Does the information aggregation/segregation of the current Zones provide meaningful information?
- How could the presentation of Zones data be improved?
- Are there any future gas developments that may impact the future accuracy and/or granularity of information provided by the current Zones?
AEMO welcomed feedback on the level of analysis provided in the draft report, and any other analysis stakeholders considered would be useful as part of this review and future GBB Zones List reviews.
Written submissions closed on Friday 7/11/2025.
Public Workshop
AEMO invited all interested parties to attend a WA Gas Consultancy Forum on the draft report (held by teleconference) on Wednesday 22/10/2025. The objective of the workshop was to discuss the draft report and preliminary findings.
Final Report
Feedback from stakeholder submissions and any additional analysis conducted by AEMO was considered and included in the final report published on 16 March 2026.