Market Wholesale Electricity Market (WA)
StageFirst Stage
ConvenorAEMO WEM
Accepting submissions?Yes
Submissions close09/12/2022

Consultation process

  • Publication of Procedure Change Proposal
    11 November 2022
  • MAC meeting
    15 November 2022
  • APCWG / CRC forum
    21 November 2022
  • Closing date for submissions on Procedure Change Proposal
    9 December 2022
  • Publication of Procedure Change Report
    15 December 2022
  • Proposed commencement of amended Procedure
    20 December 2022

Procedure Change Proposal

Wholesale Electricity Market Rules – Clause 2.10

Date of Notice: 11 November 2022

Matter under Consultation

The purpose of the Reserve Capacity Mechanism is to provide price signals for investment in the Wholesale Electricity Market (WEM), thereby facilitating the efficient entry or exit of capacity to ensure Power System Security and Power System Reliability is maintained. The accurate assignment of Certified Reserve Capacity (CRC) is critical to provide those price signals, and to ensure reliability of supply in the South West Interconnected System.

On 23 September 2022, due to a combination of issues including ongoing fuel supply limitations, AEMO called for tenders from potential suppliers of supplementary capacity for the upcoming Hot Season (1 December 2022 to 31 March 2023). This has highlighted the need for AEMO to take additional steps in our assessment of fuel availability for the 2022 Reserve Capacity Cycle CRC process.

Given the importance of the CRC process for the WEM and Market Participants, AEMO proposes to amend the Procedure to:

• specify additional information a Market Participant must provide as evidence of fuel availability in its CRC application under clause 4.10.1(e)(v)(2) of the WEM Rules; and

• clarify the matters AEMO may consider when determining its reasonable expectation of the amount of capacity likely to be available under clause 4.11.1(a) of the WEM Rules.

AEMO has also taken the opportunity to make some minor and administrative changes.

Further details are provided in the Procedure Change Proposal published with this notice. The proposed amended Procedure is also published with this notice.

Invitation to Make Submissions

AEMO invites written submissions on this Procedure Change Proposal, including any alternative or additional proposals you consider may improve the procedure/s or better meet the Wholesale Market Objectives in section 122(2) of the Electricity Industry Act 2004 (and clause 1.2.1 of the WEM Rules).

Please identify any parts of your submission that you wish to remain confidential, and explain why. AEMO may still publish that information if it does not consider it to be confidential, but will consult with you before doing so.



 Before the closing date for submissions, you may request a meeting with AEMO to discuss the issues and proposed changes raised in the Procedure Change Proposal, stating why you consider a meeting is necessary or desirable.

If appropriate, meetings may be held jointly with other stakeholders. Subject to confidentiality restrictions, AEMO will generally make details of matters discussed at a meeting available to other stakeholders, and may publish those details.

Closing Date and Time

 Submissions in response to this Procedure Change Proposal should be sent by email to, to reach AEMO by 5.00 pm (AWST) on 09 December 2022.

All submissions must be in electronic format (pdf or Microsoft Word). Submissions should use the Procedure Change Submission form available on this page.

AEMO is not obliged to consider submissions received after the closing date and time. Any late submissions should explain the reason for delay and the detriment to you if AEMO does not consider your submission.


 All submissions will be published on AEMO’s website. Confidential information will not be published, other than as specified above.

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