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Monitoring the new WEM

The ERA has developed two guidelines to assist market participants to understand and comply with the general trading obligations in the new Wholesale Electricity Market (WEM). Visit Energy Policy WA for more information on the commencement of the new WEM.

The ERA published a draft offer construction guideline and draft trading conduct guideline for consultation on 21 June 2023. Both guidelines have been updated to address submissions received during the consultation period. The ERA’s response to stakeholder feedback and an overview of changes made is included in the final report, published below.

The offer construction guideline sets out:

  • The ERA's approach to offer assessment, including how the ERA expects a market participant to construct its offers.
  • Examples of offers that would likely contravene the offer construction obligations in the WEM Rules.
  • The record keeping requirements for market participants.

The trading conduct guideline outlines how market participants can avoid conduct prohibited by the general trading obligations, which apply to all participants in the short term energy market and the real time market, including the frequency co-optimised essential system services markets.

The offer construction guideline and trading conduct guideline are required by clause 2.16D.1 of the WEM Rules consolidated companion version (22 July 2023) and are intended to take effect from the commencement of the new WEM on 1 October 2023.

The public consultation period on the draft guidelines closed on 18 July 2023. Submissions received are published below.  

Guidelines effective October 2023

Date  Documents File type
11-Sept-23 Final Report
Adobe PDF 817 kB
11-Sept-23
Offer construction guideline
Adobe PDF 477 kB
11-Sept-23 Trading conduct guideline
Adobe PDF 342 kB

Consultation June 2023

Date  Documents File type
21-Jun-23 Draft offer construction guideline
Adobe PDF 817 kB
21-Jun-23
Draft Report Request for Submission on draft guidelines
Adobe PDF 477 kB
21-Jun-23 Draft Trading conduct guideline
Adobe PDF 342 kB

Consultation June 2023 - Public Submissions

Date  Documents File type
21-Aug-23 AEC - offer construction guideline and trading conduct guideline
Adobe PDF 266 kB
21-Aug-23
AGL - covering submission - offer construction guideline
Adobe PDF 129 kB
21-Aug-23 AGL - offer construction guideline and trading conduct guideline
Adobe PDF 144 kB
21-Aug-23
Alinta Energy - offer construction guideline and trading conduct guideline Adobe PDF 100 kB
21-Aug-23
Bright Energy Investments - offer construction guideline Adobe PDF 254 kB
21-Aug-23
Shell Energy - offer construction guideline and trading conduct guideline Adobe PDF 201 kB
21-Aug-23
Synergy - offer construction guideline and trading conduct guideline Adobe PDF 500 kB
21-Aug-23
TransAlta - trading conduct guideline Adobe PDF 267 kB

Consultation December 2022

Date  Documents File type
23-Dec-22 Draft offer construction guideline
Adobe PDF 906 kB

Consultation December 2022 - Public submissions

Date  Documents File type
20-Feb-23 Alinta Energy
Adobe PDF 117 kB
20-Feb-23
Australian Energy Council
Adobe PDF 232 kB
20-Feb-23
Bright Energy Investments
Adobe PDF 452 kB
20-Feb-23
Collgar Renewables
Adobe PDF 244 kB
20-Feb-23
Shell
Adobe PDF 160 kB
20-Feb-23
Synergy
Adobe PDF 537 kB
20-Feb-23
Trans Alta
Adobe PDF 566 kB
Page last updated: 11 Sep 2023