The Wholesale Electricity Market (WEM) 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.
For information on proposing a rule change, visit the webpage: Rule Change Process.
The current WEM Rules and any Amending Rules that have been Gazetted and are awaiting commencement are provided below. For previous versions of the WEM Rules, visit the webpage: Historical versions of the WEM Rules.
Current Wholesale Electricity Market Rules
Amending Rules Gazetted and Awaiting Commencement
The sections below detail Amending Rules that have been Gazetted, but commence in the future.
Please note that unofficial ‘companion’ versions of the WEM Rules have been developed which incorporate Amending Rules that are made and have confirmed commencement dates in the future. The companion versions are available at: Unofficial Companion Versions – Wholesale Electricity Market Rules
Wholesale Electricity Market Amendment (RCM Reviews Sequencing) Rules 2025
The Amending Rules set out in Schedule 2 come into operation at 8:00 AM (WST) on 1 January 2026.
The Amending Rules set out in Schedule 3 come into operation at 8:00 AM (WST) on 1 October 2026
The Amending Rules set out in Schedule 4 come into operation at 8:00 AM (WST) on 1 October 2027
The Amending Rules set out in Schedules 5, 6 and 7 come into operation at a time specified by the Minister in a notice published in the Gazette.
Wholesale Electricity Market Amendment (Miscellaneous Amendments No 3) Rules 2024
The Amending Rules set out in Schedule 4 come into operation at a time specified by the Minister in a notice published in the Gazette.
Wholesale Electricity Market Amendment (Supplementary Capacity No. 3) Rules 2024
The Amending Rules set out in Schedule 2 come into operation at a time specified by the Minister in a notice published in the Gazette.
Wholesale Electricity Market Amendment (Supplementary Capacity No. 3) Rules 2024
Wholesale Electricity Market Amendment (Cost Allocation Reform) Rules 2024
The Amending Rules set out in Schedules 2, 3 and 4 come into operation at a time specified by the Minister in a notice published in the Gazette. Different days may be specified for different provisions.
Wholesale Electricity Market Amendment (Reserve Capacity Reform) Rules 2023
The Amending Rules set out in Schedules 2, 3 and 4 come into operation at a time specified by the Minister in a notice published in the Gazette. Different days may be specified for different provisions.
