WEM Rules

WEM Regulations

The WEM is established under the Electricity Industry (Wholesale Electricity Market) Regulations 2004.

The WEM Regulations cover the responsibilities and functions of the responsible parties including the Australian Energy Market Operator, System Management, the IMO and the Electricity Review Board under the Wholesale Electricity Market Rules (WEM Rules).

WEM Rules

The WEM Rules govern the operation of the WEM in the South West interconnected system. 

The WEM Rules detail the roles and functions of the Australian Energy Market Operator, System Management, the IMO and other governance bodies, and guide the operation of the market including the trading and dispatch of energy, the Reserve Capacity Mechanism and settlement.

The current WEM Rules consist of the Wholesale Electricity Market Amending Rules which were gazetted on 19 September 2006, together with all gazetted amendments made by the Minister for Energy prior to 15 December 2006 and amendments made by the IMO since 15 December 2006.

This consolidated version of the WEM Rules is provided as a clean copy for information. A hard copy is available for viewing in the IMO's office.

WEM Rules commencing 1 October 2016

Amending Rules 2016, Schedule B, Part 2 commence at 8:00am on 1 October 2016. 

Schedule B, Part 2 facilitates changes to the Reserve Capacity Mechanism.

The WEM Rules, made by the Minister for Energy, giving effect to these changes were gazetted on 31 May 2016. The Gazette is available here.

The IMO has not been provided with a consolidated version of the WEM Rules incorporating Schedule B, Part 2. 

WEM Rules, Schedules (to WEM Rules) and commencement dates
WEM Transitional Rules and Procedures - 30 November 2015
Historical Versions of the Market Rules

Rule Changes

All Rule Change Proposals progressed since the commencement of the formal Rule Change Process on 15 December 2006 can be found here. Any amendments to the Market Rules prior to this time were progressed by the Public Utilities Office (former Office of Energy) on behalf of the Minister for Energy and can be accessed by contacting the Public Utilities Office