AEMO Procedure Change Proposals
View all current AEMO WEM Procedures
The WEM AEMO Procedure Change Working Group (APCWG) provides advice to AEMO on Procedure Change Proposals. Meeting contents, Terms of Reference and other information is available on the WEM APCWG page.
AEMO Procedure Changes Proposals under consultation
| ID | Date Submitted | Title | Next Step | Date |
|---|---|---|---|---|
|
30 May 2025 |
IMS Interface – Network Operator and AEMO |
Consultation closure |
30 June 2025 |
|
|
16 May 2025 |
Identification of Affected Dispatch Intervals |
Consultation closes |
16 June 2025 |
|
|
15 May 2025 |
Undertaking the Long Term PASA |
Consultation closes |
13 June 2025 |
|
|
14 May 2025 |
Mid Peak and Flexible Electric Storage Resource Obligation Intervals |
Consultation closes |
12 June 2025 |
|
|
7 May 2025 |
Commissioning Tests |
Consultation closes |
6 June 2025 |
|
|
9 May 2025 |
RCM Limit Advice Requirements |
Consultation closes |
9 June 2025 |
-
Completed Procedure Change Proposals
Completed Procedure Change Proposals include those undertaken by AEMO, the former Independent Market Operator, and the former System Management.
ID Submitter Title Status/Date AEMO
Certification of Reserve Capacity
Commenced
14/04/2025
AEMO
Dispatch Settlement and Monitoring Data
Commenced
02/04/2025
AEMO
Facility Sub-Metering
Commenced
17/02/2025
AEMO
Credible Contingency Events
Commenced
12/02/2025
AEMO
Outage Intention Plans
Commenced
06/02/2025
AEMO
Direction of Registered Facilities in Scarcity Conditions
Commenced
01/02/2025
AEMO
Minimum Eligibility Requirements for Flexible CRC
Commenced
15/01/2025
AEMO
Dispatch Algorithm Formulation
Commenced
06/01/2025
AEMO
Determination of Market Schedules
Commenced
06/01/2025
AEMO
Real-Time Market Suspension
Commenced
20/12/2024
AEMO
Reliability Standard Implementation
Commenced
02/12/2024
AEMO
GPS Compliance Tests and Generator Monitoring Plans
Commenced
29/10/2024
AEMO
Dispatch Compliance
Commenced
15/10/2024
AEMO
Direction of Registered Facilities in Scarcity Conditions
Commenced
15/10/2024
AEMO
Reserve Capacity Testing
Commenced
01/10/2024
AEMO
Network Access Quantity
Commenced
30/09/2024
AEMO
Supplementary Capacity
Commenced
10/09/2024
AEMO
Mid Peak Electric Storage Resource Obligation Intervals
Commenced
01/07/2024
AEMO
RCM Constraint Formulation
Commenced
13/06/2024
AEMO
Long Term Projected Assessment of System Adequacy
Commenced
13/06/2024
AEMO
Supplementary Capacity
Commenced
01/04/2023
AEMO
Reserve Capacity Security
Commenced
02/10/2023
AEMO
Certification of Reserve Capacity
Consultation
12/04/2024
AEMO
Dispatch Algorithm Formulation Updates
Commenced
12/12/2023
AEMO
Distributed Energy Resource (DER) Register Information
Commenced
02/10/2023
AEMO
Supplementary Capacity
Commenced
01/07/2023
AEMO
Certification of Reserve Capacity for the 2022 and 2023 Reserve Capacity Cycle
Commenced
20/12/2022
AEMO
Prudential Requirements
Commenced
28/2/2021
AEMO
Reserve Capacity Testing
Commenced
01/10/2021
AEMO
Capacity Credit Allocation
Commenced
16/9/2021
AEMO
Settlements
Commenced
16/9/2021
AEMO
Revisions to BMO tie-break methodology
Rejected
30/04/2021
AEMO
Facility Registration, De-registration and Transfer
Commenced
19/03/2021
AEMO
Settlement
Commenced
19/03/2021
AEMO
Declaration of Bilateral Trades and the Reserve Capacity Auction
Commenced
16/10/2020
AEMO
Reduction of Prudential Exposure (Phase 2)
Commenced
24/08/2020
AEMO
Reserve Capacity Testing
Commenced
01/08/2020
AEMO
Reserve Capacity Security
Commenced
01/07/2020
AEMO
Certification of Reserve Capacity
Commenced
15/06/2020
AEMO
Prudential Requirements - Credit Limit Calculation
Commenced
09/12/2019
AEMO
Facility Outages
Commenced
01/02/2020
AEMO
Formalisation of the Process for Maintenance Applications
Commenced
01/10/2019
AEMO
Communications and Control Systems
Commenced
01/07/2019
AEMO
Dispatch
Commenced
01/07/2019
AEMO
Removal of Resource Plans and Dispatchable Loads
Commenced
01/07/2019
AEMO
Ancillary Services
Commenced
01/07/2019
AEMO
Power System Security
Commenced
01/07/2019
AEMO
IMS Interface
Commenced
01/07/2019
AEMO
Monitoring and Reporting Protocol
Commenced
22/05/2019
AEMO
Short Term Projected Assessment of System Adequacy
Commenced
01/06/2019
AEMO
Medium Term Projected Assessment of System Adequacy
Commenced
01/06/2019
AEMO
Commissioning Tests
Commenced
01/06/2019
AEMO
Facility Outages
Commenced
07/01/2019
AEMO
Tolerance Ranges
Commenced
21/04/2018
AEMO
Individual Reserve Capacity Requirements
Commenced
03/11/2017
AEMO
Network Modelling Data
Commenced
13/10/2017
AEMO
IMS Interface
Commenced
13/10/2017
AEMO
Dispatch
Commenced
01/10/2017
AEMO
Notices and Communications
Commenced
01/10/2017
AEMO
Undertaking the Long Term PASA and conducting a review of the planning criterion
Commenced
01/10/2017
AEMO
Reserve Capacity Performance Monitoring
Commenced
01/10/2017
AEMO
Certification of Reserve Capacity
Commenced
01/10/2017
AEMO
Determination of DSM Dispatch Payment Tranches and Adjustments
Commenced
01/10/2017
AEMO
Determination of Expected DSM Dispatch Quantity and DSM Activation Price
Commenced
08/06/2017
AEMO
12 Market Procedures (see linked page)
Commenced
18/04/2017
IMO
Changes to Market Procedure for Reserve Capacity Performance Monitoring
Rejected
02/04/2015
IMO
Changes to Market Procedure for Reserve Capacity Security
Commenced
19/01/2015
IMO
Changes to Market Procedure for Certification for Reserve Capacity
Commenced
1/01/2015
IMO
Changes to Market Procedure for Prudential Requirements
Commenced
1/05/2014
IMO
Changes to Market Procedure for Bilateral Trade Declarations and Reserve Capacity Auction
Commenced
16/04/2014
IMO
Amendments to Market Procedure for Settlement
Commenced
1/01/2014
IMO
Changes to Market Procedure for Rule Participant Registration and De-Registration
Commenced
1/11/2013
IMO
Changes to Market Procedure for Facility Registration, De-Registration and Transfer
Commenced
1/11/2013
IMO
Amendments to Market Procedure for IMS Interface
Commenced
2/10/2013
IMO
Changes to Market Procedure for Notices and Communications
Closed
18/06/2013
IMO
Changes to Market Procedure for Determining Loss Factors
Commenced
20/05/2013
IMO
Amendments to Market Procedure for IMS Interface
Commenced
22/04/2013
IMO
Changes to Market Procedure for Certification of Reserve Capacity
Commenced
18/03/2013
IMO
Changes to Reserve Capacity Procedure for Declaration of Bilateral Trades and the Reserve Capacity Auction
Commenced
25/02/2013
IMO
Amendments to Market Procedure for Maximum Reserve Capacity Price
Commenced
15/01/2013
IMO
Amendments to Market Procedure for Data and IT Interface
Commenced
13/08/2012
IMO
New Market Procedure for Balancing Facility Requirements
Commenced
1/07/2012
IMO
New Market Procedure for Balancing Market Forecasts
Commenced
1/07/2012
IMO
New Market Procedure for IMS Interface
Commenced
1/07/2012
IMO
Changes to Market Procedure for Reserve Capacity Security
Commenced
2/04/2012
IMO
Changes to Market Procedure for Supplementary Reserve Capacity
Commenced
23/01/2012
IMO
Changes to Market Procedure for Procedure Administration
Commenced
1/01/2012
IMO
Changes to Market Procedure for Monitoring Protocol
Withdrawn
24/11/2011
IMO
5-Yearly Review of the Methodology and Process for Determining the Maximum Reserve Capacity Price
Commenced
24/10/2011
IMO
Market Procedure for Reserve Capacity Testing
Commenced
1/10/2011
IMO
Revocation of Market Procedure for Procurement of Network Control Service
Commenced
1/07/2011
IMO
Market Procedure for Data and IT Interface Requirements
Commenced
1/07/2011
IMO
Transitional arrangements for the Registration of Demand Side Programmes and the association of Non-Dispatchable Loads (New Market Procedure)
Commenced
1/07/2011
IMO
Changes to Market Procedure for Reserve Capacity Performance Monitoring
Commenced
18/04/2011
IMO
Changes to Market Procedure for Web Site Changes
Commenced
24/01/2011
IMO
Changes to Market Procedure for the Certification of Reserve Capacity
Commenced
15/12/2010
IMO
Changes to Market Procedure for Procedure Administration
Commenced
8/11/2010
IMO
Changes to Market Procedure for Notices and Communications
Commenced
8/11/2010
IMO
Market Procedure for the Determination of Maximum Reserve Capacity Price
Commenced
11/10/2010
IMO
Market Procedure for Reserve Capacity Testing (V3)
Commenced
1/10/2010
IMO
Market Procedure for Undertaking the LT PASA and conducting a Review of the Planning Criterion
Commenced
1/06/2010
IMO
Market Procedure for the Determination of Maximum Reserve Capacity Price
Commenced
1/04/2010
IMO
Market Procedure for Declaration of Bilateral Trades and the Reserve Capacity Auction
Commenced
1/01/2010
IMO
Market Procedure for Procedure Administration
Commenced
1/10/2009
IMO
Market Procedure for Meter Data Submissions
Commenced
1/10/2009
IMO
Reserve Capacity Security
Commenced
24/07/2009
IMO
Market Procedure for Registration and De-registration of Rule Participants
Commenced
24/07/2009
IMO
Notices and Communications
Commenced
20/01/2009
IMO
Market Procedure for Individual Reserve Capacity Requirements
Commenced
11/12/2008
IMO
Market Procedure for Determination of Maximum Reserve Capacity Price
Commenced
4/12/2008
IMO
Market Procedure for Individual Reserve Capacity Requirements
Withdrawn
27/10/2008
IMO
Market Procedure: Facility Registration, Facility De-registration and Facility Transfer
Commenced
26/11/2008
IMO
Market Procedure: Monitoring Protocol
Commenced
20/10/2008
IMO
Market Procedure for Procurement of Network Control Service
Commenced
20/10/2008
IMO
Market Procedure for Reserve Capacity Performance Monitoring
Commenced
15/10/2008
IMO
Market Procedure for Prudential Requirements
Commenced
15/10/2008
IMO
Market Procedure for Determination of the Maximum Reserve Capacity Price
Commenced
13/10/2008
IMO
Market Procedure for Certification of Reserve Capacity
Commenced
15/07/2008
IMO
Market Procedure for Declaration of Bilateral Trades and the Reserve Capacity Auction
Commenced
15/07/2008
IMO
Market Procedure for Registration of Rule Participants
Commenced
12/06/2008
IMO
Market Procedure for Facility Registration, Facility De-registration and Facility Transfer
Commenced
12/06/2008
IMO
Market Procedure for Web Site Changes
Commenced
12/06/2008
System Management
Changes to PSOP: Facility Outages as a result of RC_2012_11: Transparency of Outage Information
Commenced
7/04/2014
System Management
Revised PSOP: Dispatch
Commenced
5/03/2014
System Management
Revised PSOP: Commissioning and Testing
Commenced
1/03/2014
System Management
Revised PSOP: Monitoring and Reporting Protocol
Rejected
01/08/2013
System Management
Replaced PSOPs: Competitive Balancing and Load Following Market 1
Commenced
1/07/2012
System Management
Replaced PSOPs: Competitive Balancing and Load Following Market 2
Commenced
1/07/2012
System Management
Replaced PSOPs: Competitive Balancing and Load Following Market 3
Commenced
1/07/2012
System Management
Operational Data Points
Commenced
6/02/2012
System Management
Commissioning and Testing
Commenced
1/08/2011
System Management
Facility Outages
Commenced
1/08/2011
System Management
Dispatch
Commenced
1/08/2011
System Management
Monitoring and Reporting Protocol
Commenced
1/08/2011
System Management
Dispatch
Commenced
1/04/2010
System Management
Dispatch
Commenced
1/03/2010
System Management
Dispatch
Commenced
1/03/2010
System Management
Cleansing of Generation Facility MWh Output Data
Commenced
1/11/2009
System Management
Monitoring and Reporting
Commenced
1/10/2009
System Management
Commissioning and Testing
Commenced
1/09/2009
System Management
Communications and Control Systems
Commenced
1/09/2009
System Management
Operational Data Points for Generating Plant
Commenced
1/08/2009
System Management
Operational Data Points for Non-Western Power Networks, Substations and Loads
Commenced
1/08/2009
System Management
Facility Outages
Commenced
1/04/2009
System Management
Ancillary Services
Commenced
1/04/2009
System Management
MT PASA
Commenced
1/04/2009
System Management
ST PASA
Commenced
1/04/2009
System Management
Power System Security
Commenced
1/02/2009
System Management
System Restart Overview
Commenced
1/04/2008