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Wholesale Electricity Market Rules

The Wholesale Electricity Market in Western Australia is established under the Electricity Industry (Wholesale Electricity Market) Regulations 2004 and is governed by the Wholesale Electricity Market Rules (WEM Rules).

These WEM Rules detail the roles and functions of the Australian Energy Market Operator (AEMO) and other governance bodies, and guide the operation of the market including the trading and dispatch of energy, the Reserve Capacity Mechanism and settlement.

Current Wholesale Electricity Market Rules

Documents     File type
Wholesale Electricity Market Rules 1 February 2021 Adobe PDF3 MB
Wholesale Electricity Market Rules 1 February 2021 Adobe PDF1 MB

Amending Rules Gazetted and Awaiting Commencement

Please note that the Energy Transformation Implementation Unit has developed a Consolidated ‘Companion’ version of the WEM Rules that incorporates the Amending Rules that have been made by the Minister for Energy to give effect to the Energy Transformation Strategy but have not yet commenced. See WEM Rules – Consolidated Companion Versions.

Documents File type

Wholesale Electricity Market Amendment (Governance) Rules 2021
(Schedule B due to commence 8:00 AM 1 July 2021
Schedule C due to commence immediately after commencement of the Amending Rules in clauses 50 and 62 of Schedule C of the Wholesale Electricity Market Amendment (Tranches 2 and 3 Amendments) Rules 2020)

 Adobe PDF235 kB

Wholesale Electricity Market Amendment (Tranches 2 and 3 Amendments) Rules 2020
(Provisions in Schedule C due to commence at the times specified by the Minister in notices published in the Gazette. Confirmed upcoming Schedule C commencement dates include:
8:00 AM 1 July 2021 (Gazette 2021/20))

 Adobe PDF2 MB

Wholesale Electricity Market Amendment (Tranche 1 Amendments) Rules 2020
(Schedule C due to commence 8:00 AM 1 October 2021)

Adobe PDF1 MB

Wholesale Electricity Market Rules – Wholesale Electricity Market Amendment (Reserve Capacity Pricing Reforms) Rules 2019
(second set of Amending Rules due to commence 8:00 AM 1 October 2021)

Adobe PDF605 kB
Wholesale Electricity Market Rules – Amending Rules 2016 Schedule B Part 4
(due to commence at a time specified by the Minister in a notice published in the Gazette)
Adobe PDF567 kB

Historical Versions of the Wholesale Electricity Market Rules

Documents File type
Wholesale Electricity Market Rules 1 January 2021
 Adobe PDF3 MB
Wholesale Electricity Market Rules 1 December 2020  Adobe PDF3 MB
Wholesale Electricity Market Rules 25 November 2020
 Adobe PDF3 MB
 Wholesale Electricity Market Rules 7 August 2020  Adobe PDF3 MB
Wholesale Electricity Market Rules 21 July 2020  Adobe PDF3 MB
Wholesale Electricity Market Rules 2 July 2020
 Adobe PDF3 MB
Wholesale Electricity Market Rules 1 July 2020
 Adobe PDF2 MB
Wholesale Electricity Market Rules 24 June 2020
 Adobe PDF3 MB
Wholesale Electricity Market Rules 30 March 2020
 Adobe PDF3 MB
Wholesale Electricity Market Rules 22 February 2020
 Adobe PDF2 MB
Wholesale Electricity Market Rules 1 February 2020
 Adobe PDF3 MB
Wholesale Electricity Market Rules 1 November 2019
 Adobe PDF2 MB
Wholesale Electricity Market Rules 1 October 2019
 Adobe PDF2 MB
Wholesale Electricity Market Rules 1 September 2019
 Adobe PDF2 MB
Wholesale Electricity Market Rules 1 August 2019
 Adobe PDF2 MB
Wholesale Electricity Market Rules 1 July 2019
 Adobe PDF1 MB
Wholesale Electricity Market Rules 1 June 2019
 Adobe PDF2 MB
Wholesale Electricity Market Rules 11 January 2019
Adobe PDF2 MB 
Wholesale Electricity Market Rules 18 October 2018

Adobe PDF3 MB

Wholesale Electricity Market Rules 1 September 2018 Adobe PDF2.5 MB
Wholesale Electricity Market Rules 1 August 2018 Adobe PDF2.8 MB
Wholesale Electricity Market Rules 29 June 2018 (1:00pm) Adobe PDF2.8 MB
Wholesale Electricity Market Rules 29 June 2018 (8:00am) Adobe PDF2.7 MB
Wholesale Electricity Market Rules 28 April 2018 Adobe PDF1.9 MB
Corrigenda - Wholesale Electricity Market Rules 27 March 2018 Adobe PDF1.9 MB

Wholesale Electricity Market Rules 27 March 2018

Adobe PDF1.9 MB
Wholesale Electricity Market Rules 23 March 2018 Adobe PDF2.7 MB
Wholesale Electricity Market Rules 20 March 2018 Adobe PDF2.65 MB
Wholesale Electricity Market Rules 13 October 2017
The Rules were updated on 6 December 2017 due to omissions in the Market Rules arising from the application of the eight sets of Amending Rules in the Gazettes from 25 November 2015 to 30 June 2017.
Adobe PDF1.9 MB
Wholesale Electricity Market Rules 1 October 2017
Adobe PDF2.7 MB
Wholesale Electricity Market Rules 1 September 2017
Adobe PDF2.47 MB
Wholesale Electricity Market Rules 1 July 2017
Adobe PDF2.47 MB
Wholesale Electricity Market Rules 30 June 2017
Adobe PDF2.45 MB
Wholesale Electricity Market Rules 24 June 2017
Adobe PDF2.45 MB
Wholesale Electricity Market Rules 31 May 2017
Adobe PDF2.28 MB
Wholesale Electricity Market Rules 10 December 2016
Adobe PDF2.22 MB
Wholesale Electricity Market Rules 26 November 2016
(Transfer of functions to Rule Change Panel)
Adobe PDF249 kB
Wholesale Electricity Market Rules 1 July 2016
Adobe PDF1.84 kB
Wholesale Electricity Market Rules 1 June 2016
Adobe PDF1.94 MB
Wholesale Electricity Market Rules 30 November 2015
(In track changes - showing the amendments made on 30 November 2015)
Adobe PDF2.2 MB
Wholesale Electricity Market Rules 30 November 2015
(Transfer of market operation functions to AEMO)
Adobe PDF2.8 MB
Wholesale Electricity Market Rules 1 September 2015
(Pre transfer of market operation functions to AEMO)
Adobe PDF2.82 MB
Wholesale Electricity Market Rules 6 June 2012
(Pre Balancing Market Commencement)
Adobe PDF2.03 MB
Wholesale Electricity Market Rules 19 September 2006
Adobe PDF2.87 kB
Wholesale Electricity Market Rules 3 April 2006
Adobe PDF2.28 MB
Wholesale Electricity Market Rules 5 October 2004
Adobe PDF2.16 MB
Adobe PDF
Adobe PDF
Page last updated: 03 Feb 2021