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 under consultation
ID | Date Submitted | Title | Next Step | Date |
---|---|---|---|---|
22/01/2025 |
Dispatch Settlement and Monitoring Data |
Consultation closure |
05/03/2025 |
|
13/12/2024 |
Credible Contingency Events |
Consultation closure |
24/01/2025 |
|
11/12/2024 |
Facility Sub-Metering |
Consultation closure |
31/01/2025 |
AEMO procedure change proposals that have been withdrawn or rejected
ID | Date Submitted | Title | Next Step | Date |
---|---|---|---|---|
02/04/2020 |
Revisions to BMO tie-break methodology |
Rejected |
30/04/2021 |
AEMO procedure changes that have commenced
ID | Date Submitted | Title | Next Step | Date |
---|---|---|---|---|
21/11/2024 |
Outage Intention Plans |
Commenced |
06/02/2025 |
|
11/12/2024 |
Direction of Registered Facilities in Scarcity Conditions |
Commenced |
01/02/2025 |
|
06/11/2024 |
Minimum Eligibility Requirements for Flexible CRC |
Commenced |
15/01/2025 |
|
31/10/2024 |
Dispatch Algorithm Formulation |
Commenced |
06/01/2025 |
|
31/10/2024 |
Determination of Market Schedules |
Commenced |
06/01/2025 |
|
30/10/2024 |
Real-Time Market Suspension |
Commenced |
20/12/2024 |
|
24/10/2024 |
Reliability Standard Implementation |
Commenced |
2/12/2024 |
|
23/09/2024 |
GPS Compliance Tests and Generator Monitoring Plans |
Commenced |
29/10/2024 |
|
09/08/2024 |
Dispatch Compliance |
Commenced |
15/10/2024 |
|
11/09/2024 |
Direction of Registered Facilities in Scarcity Conditions |
Commenced |
15/10/2024 |
|
26/08/2024 |
Reserve Capacity Testing |
Commenced |
01/10/2024 |
|
26/08/2024 |
Network Access Quantity |
Commenced |
30/09/2024 |
|
09/09/2024 |
Supplementary Capacity |
Commenced |
10/09/2024 |
|
22/05/2024 |
Mid Peak Electric Storage Resource Obligation Intervals |
Commenced |
01/07/2024 |
|
02/05/2024 |
RCM Constraint Formulation |
Commenced |
13/06/2024 |
|
01/05/2024 |
Long Term Projected Assessment of System Adequacy |
Commenced |
13/06/2024 |
|
28/03/2024 |
Supplementary Capacity v6.0 |
Commenced |
01/04/2023 |
|
28/02/2024 |
Certification of Reserve Capacity |
Consultation |
12/04/2024 |
|
26/10/2023 |
Dispatch Algorithm Formulation Updates |
Commenced |
12/12/2023 |
|
20/06/23 |
Reserve Capacity Security v7.0 |
Commenced |
02/10/2023 |
|
12/12/2022 |
Distributed Energy Resource (DER) Register Information |
Commenced |
02/10/2023 |
|
20/06/23 |
Reserve Capacity Security v6.0 |
Commenced |
18/08/2023 |
|
30/06/23 |
Supplementary Capacity |
Commenced |
01/07/2023 |
|
11/11/2022 |
Certification of Reserve Capacity for the 2022 and 2023 Reserve Capacity Cycle |
Commenced |
20/12/2022 |
|
17/12/2021 |
Market Procedure: Prudential Requirements |
Commenced |
28/2/2021 |
|
27/7/2021 |
Reserve Capacity Testing |
Commenced |
1/10/2021 |
|
9/8/2021 |
Capacity Credit Allocation |
Commenced |
16/9/2021 |
|
9/8/2021 |
Settlement |
Commenced |
16/9/2021 |
|
21/01/2021 |
Facility Registration, De-registration and Transfer |
Commenced |
19/03/2021 |
|
21/01/2021 |
Settlement |
Commenced |
19/03/2021 |
|
21/08/2020 |
Declaration of Bilateral Trades and the Reserve Capacity Auction |
Commenced |
16/10/2020 |
|
10/06/2020 |
Reduction of Prudential Exposure (Phase 2) |
Commenced |
24/08/2020 |
|
19/05/2020 |
Market Procedure: Reserve Capacity Testing |
Commenced |
01/08/2020 |
|
N/A |
01/07/2020 |
Commenced |
01/07/2020 |
|
18/05/2020 |
Market Procedure: Reserve Capacity Security |
Commenced |
01/07/2020 |
|
12/03/2019 |
Market Procedure: Certification of Reserve Capacity |
Commenced |
15/06/2020 |
|
04/11/2019 |
Prudential Requirements - Credit Limit Calculation |
Commenced |
09/12/2019 |
|
16/12/2019 |
Facility Outages |
Commenced |
01/02/2020 |
|
9/08/2019 |
Formalisation of the Process for Maintenance Applications |
Commenced |
01/10/2019 |
|
20/04/2018 |
Communications and control systems |
Commenced |
01/07/2019 |
|
08/05/2019 |
Dispatch |
Commenced |
01/07/2019 |
|
08/05/2019 |
Removal of Resource Plans and Dispatchable Loads |
Commenced |
01/07/2019 |
|
01/05/2019 |
Ancillary Services |
Commenced |
01/07/2019 |
|
01/05/2019 |
Power System Security |
Commenced |
01/07/2019 |
|
20/04/2018 |
Market Procedure - IMS Interface |
Commenced |
01/07/2019 |
|
18/03/2019 |
Reduction of Prudential Exposure in the Reserve Capacity Mechanism |
Commenced |
27/06/2019 |
|
29/01/2018 |
Market Procedure - Monitoring and Reporting Protocol |
Commenced |
22/05/2019 |
|
22/02/2019 |
Short Term Projected Assessment of System Adequacy |
Commenced |
01/06/2019 |
|
22/02/2019 |
Medium Term ProjectedAssessment of System Adequacy |
Commenced |
01/06/2019 |
|
22/02/2019 |
Commissioning Tests |
Commenced |
01/06/2019 |
|
18/03/2019 |
Reduction of Prudential Exposure in the Reserve Capacity Mechanism |
Commenced |
01/05/2019 |
|
15/10/2018 |
PSOP - Facility Outages |
Commenced |
07/01/2019 |
|
06/02/2018 |
PSOP - Tolerance Ranges |
Commenced |
21/04/2018 |
|
06/07/2017 |
Market Procedure - Individual Reserve Capacity Requirements |
Commenced |
03/11/2017 |
|
19/07/2017 |
PSOP - Network Modelling Data |
Commenced |
13/10/2017 |
|
19/07/2017 |
Market Procedure - IMS Interface |
Commenced |
13/10/2017 |
|
21/07/2017 |
PSOP - Dispatch |
Commenced |
01/10/2017 |
|
21/07/2017 |
Market Procedure - Notices and Communications |
Commenced |
01/10/2017 |
|
06/07/2017 |
Market Procedure - Undertaking the Long Term PASA and conducting a review of the planning criterion |
Commenced |
01/10/2017 |
|
06/07/2017 |
Market Procedure - Reserve Capacity Performance Monitoring |
Commenced |
01/10/2017 |
|
27/06/2017 |
Market Procedure - Certification of Reserve Capacity |
Commenced |
01/10/2017 |
|
02/06/2017 |
Market Procedure: Determination of DSM Dispatch Payment Tranches and Adjustments |
Commenced |
01/10/2017 |
|
23/03/2017 |
Market Procedure: Determination of Expected DSM Dispatch Quantity and DSM Activation Price |
Commenced |
08/06/2017 |
|
03/04/2017 |
Commenced |
18/04/2017 |
IMO procedure changes up to 2015
Procedure Changes with consultation period closed
ID | Date Submitted | Title | Submitter | Next Step | Date |
---|---|---|---|---|---|
18/06/2013 |
Changes to Market Procedure for Notices and Communications |
IMO |
Procedure Change Report Published |
TBA |
Procedure Changes that have Commenced
ID | Date Submitted | Title | Submitter | Next Step | Date |
---|---|---|---|---|---|
17/04/2008 |
Market Procedure for Registration of Rule Participants |
IMO |
Commenced |
12/06/2008 |
|
17/04/2008 |
Market Procedure for Facility Registration, Facility De-registration and Facility Transfer |
IMO |
Commenced |
12/06/2008 |
|
17/04/2008 |
Market Procedure for Web Site Changes |
IMO |
Commenced |
12/06/2008 |
|
17/04/2008 |
Market Procedure for Certification of Reserve Capacity |
IMO |
Commenced |
15/07/2008 |
|
17/04/2008 |
Market Procedure for Declaration of Bilateral Trades and the Reserve Capacity Auction |
IMO |
Commenced |
15/07/2008 |
|
01/08/2008 |
Market Procedure for Determination of the Maximum Reserve Capacity Price |
IMO |
Commenced |
13/10/2008 |
|
01/08/2008 |
Market Procedure for Reserve Capacity Performance Monitoring |
IMO |
Commenced |
15/10/2008 |
|
01/08/2008 |
Market Procedure for Prudential Requirements |
IMO |
Commenced |
15/10/2008 |
|
01/08/2008 |
Market Procedure: Monitoring Protocol |
IMO |
Commenced |
20/10/2008 |
|
01/08/2008 |
Market Procedure for Procurement of Network Control Service |
IMO |
Commenced |
20/10/2008 |
|
16/10/2008 |
Market Procedure: Facility Registration, Facility De-registration and Facility Transfer |
IMO |
Commenced |
26/11/2008 |
|
30/10/2008 |
Market Procedure for Determination of Maximum Reserve Capacity Price |
IMO |
Commenced |
04/12/2008 |
|
27/10/2008 |
Market Procedure for Individual Reserve Capacity Requirements |
IMO |
Commenced |
11/12/2008 |
|
15/12/2008 |
Notices and Communications |
IMO |
Commenced |
20/01/2009 |
|
11/05/2009 |
Reserve Capacity Security |
IMO |
Commenced |
24/07/2009 |
|
04/08/2009 |
Market Procedure for Procedure Administration |
IMO |
Commenced |
01/10/2009 |
|
11/05/2009 |
Market Procedure for Registration and De-registration of Rule Participants |
IMO |
Commenced |
24/07/2009 |
|
30/09/2009 |
Market Procedure for Declaration of Bilateral Trades and the Reserve Capacity Auction |
IMO |
Commenced |
01/01/2010 |
|
04/08/2009 |
Market Procedure for Meter Data Submissions |
IMO |
Commenced |
01/10/2009 |
|
04/01/2010 |
Market Procedure for Reserve Capacity Testing (V3) |
IMO |
Commenced |
01/10/2010 |
|
04/01/2010 |
Market Procedure for Undertaking the LT PASA and conducting a Review of the Planning Criterion |
IMO |
Commenced |
01/06/2010 |
|
20/11/2009 |
Market Procedure for the Determination of Maximum Reserve Capacity Price |
IMO |
Commenced |
01/04/2010 |
|
30/08/2010 |
Changes to Market Procedure for Procedure Administration |
IMO |
Commenced |
08/11/2010 |
|
30/08/2010 |
Changes to Market Procedure for Notices and Communications |
IMO |
Commenced |
08/11/2010 |
|
09/08/2010 |
Market Procedure for the Determination of Maximum Reserve Capacity Price |
IMO |
Commenced |
11/10/2010 |
|
15/11/2011 |
Changes to Market Procedure for Reserve Capacity Performance Monitoring |
IMO |
Commenced |
18/04/2011 |
|
20/09/2010 |
Changes to Market Procedurefor Certification ofReserve Capacity |
IMO |
Commenced |
15/12/2010 |
|
15/11/2010 |
Changes to Market Procedure for Web Site Changes |
IMO |
Commenced |
24/01/2011 |
|
22/11/2010 |
Changes to Market Procedure for Supplementary Reserve Capacity |
IMO |
Commenced |
23/01/2012 |
|
28/03/2011 |
Revocation of Market Procedure for Procurement of Network Control Service |
IMO |
Commenced |
01/07/2011 |
|
31/03/2011 |
Market Procedure for Data and IT Interface Requirements |
IMO |
Commenced |
01/07/2011 |
|
06/04/2011 |
Transitional arrangements for the Registration of Demand Side Programmes and the association of Non-Dispatchable Loads (New Market Procedure) |
IMO |
Commenced |
01/07/2011 |
|
05/08/2011 |
Market Procedure for Reserve Capacity Testing |
IMO |
Commenced |
01/10/2011 |
|
06/09/2011 |
5-Yearly Review of the Methodology and Process for Determining the Maximum Reserve Capacity Price |
IMO |
Commenced |
24/10/2011 |
|
1/11/2011 |
Changes to Market Procedure for Procedure Administration |
IMO |
Commenced |
1/01/2012 |
|
18/01/2012 |
Changes to Market Procedure for Reserve Capacity Security |
IMO |
Commenced |
02/04/2012 |
|
06/01/2012 |
New Market Procedure for Balancing Facility Requirements |
IMO |
Commenced |
01/07/2012 |
|
06/01/2012 |
New Market Procedure for Balancing Market Forecasts |
IMO |
Commenced |
01/07/2012 |
|
03/02/2012 |
New Market Procedure for IMS Interface |
IMO |
Commenced |
01/07/2012 |
|
11/06/2012 |
Amendments to Market Procedure for Data and IT Interface |
IMO |
Commenced |
13/08/2012 |
|
27/09/2012 |
Changes to Reserve Capacity Procedure for Declaration of Bilateral Trades and the Reserve Capacity Auction |
IMO |
Commenced |
25/02/2013 |
|
03/09/2012 |
Changes to Market Procedure for Certification of Reserve Capacity |
IMO |
Commenced |
18/03/2013 |
|
12/11/2012 |
Amendments to Market Procedure for Maximum Reserve Capacity Price |
IMO |
Commenced |
15/01/2013 |
|
15/03/2013 |
Changes to Market Procedure for Determining Loss Factors |
IMO |
Commenced |
20/05/2013 |
|
05/11/2012 |
Amendments to Market Procedure for IMS Interface |
IMO |
Commenced |
22/04/2013 |
|
02/07/2013 |
Changes to Market Procedure for Rule Participant Registration and De-Registration |
IMO |
Commenced |
01/11/2013 |
|
02/07/2013 |
Changes to Market Procedure for Facility Registration, De-Registration and Transfer |
IMO |
Commenced |
01/11/2013 |
|
13/01/2014 |
Changes to Market Procedure for Prudential Requirements |
IMO |
Commenced |
01/05/2014 |
|
10/02/2014 |
Changes to Market Procedure for Certification for Reserve Capacity |
IMO |
Commenced |
01/01/2015 |
|
21/11/2013 |
Amendments to Market Procedure for Settlement |
IMO |
Commenced |
01/01/2014 |
|
30/08/2013 |
Amendments to Market Procedure for IMS Interface |
IMO |
Commenced |
02/10/2013 |
|
14/02/2014 |
Changes to Market Procedure for Bilateral Trade Declarations and Reserve Capacity Auction |
IMO |
Commenced |
16/04/2014 |
|
14/07/2014 |
Changes to Market Procedure for Reserve Capacity Security |
IMO |
Commenced |
19/01/2015 |
Procedure Change Proposals that have been Withdrawn or Rejected
ID | Date submitted | Title | Submitter | Next step | Date |
---|---|---|---|---|---|
16/10/2008 |
Market Procedure for Individual Reserve Capacity Requirements |
IMO |
Withdrawn |
27/10/2008 |
|
17/11/2010 |
Changes to Market Procedure for Monitoring Protocol |
IMO |
Withdrawn |
24/11/2011 |
|
10/02/2014 |
Changes to Market Procedure for Reserve Capacity Performance Monitoring |
IMO |
Rejected |
02/04/2015 |
System Management procedure changes up to 2015
Current Power System Operation Procedures can be found here
Procedure Change Proposals which have Commenced
ID | Date submitted | Title | Submitter | Next step | Date |
---|---|---|---|---|---|
11/02/2008 |
System Restart Overview |
System Management |
Commenced |
01/04/2008 |
|
6/11/2008 |
Power System Security |
System Management |
Commenced |
01/02/2009 |
|
14/01/2009 |
Facility Outages |
System Management |
Commenced |
01/04/2009 |
|
14/01/2009 |
Ancillary Services |
System Management |
Commenced |
01/04/2009 |
|
14/01/2009 |
MT PASA |
System Management |
Commenced |
01/04/2009 |
|
14/01/2009 |
ST PASA |
System Management |
Commenced |
01/04/2009 |
|
11/05/2009 |
Operational Data Points for Generating Plant |
System Management |
Commenced |
01/08/2009 |
|
11/05/2009 |
Operational Data Points for Non-Western Power Networks, Substations and Loads |
System Management |
Commenced |
01/08/2009 |
|
05/06/2009 |
Commissioning and Testing |
System Management |
Commenced |
01/09/2009 |
|
05/06/2009 |
Cleansing of Generation Facility MWh Output Data |
System Management |
Commenced |
01/11/2009 |
|
23/06/2009 |
Communications and Control Systems |
System Management |
Commenced |
01/09/2009 |
|
12/08/2009 |
Monitoring and Reporting |
System Management |
Commenced |
01/10/2009 |
|
18/08/2009 |
Dispatch |
System Management |
Commenced |
01/03/2010 |
|
27/11/2009 |
Dispatch |
System Management |
Commenced |
01/03/2010 |
|
13/01/2010 |
Dispatch |
System Management |
Commenced |
01/04/2010 |
|
06/12/2010 |
Commissioning and Testing |
System Management |
Commenced |
01/08/2011 |
|
06/12/2010 |
Facility Outages |
System Management |
Commenced |
01/08/2011 |
|
03/03/2011 |
Dispatch |
System Management |
Commenced |
01/08/2011 |
|
03/03/2011 |
Monitoring and Reporting Protocol |
System Management |
Commenced |
01/08/2011 |
|
04/11/2011 |
Operational Data Points |
System Management |
Commenced |
06/02/2012 |
|
04/01/2012 |
Replaced PSOPs: Competitive Balancing and Load Following Market 1 |
System Management |
Commenced |
01/07/2012 |
|
12/01/2012 |
Replaced PSOPs: Competitive Balancing and Load Following Market 2 |
System Management |
Commenced |
01/07/2012 |
|
12/01/2012 |
Replaced PSOPs: Competitive Balancing and Load Following Market 3 |
System Management |
Commenced |
01/07/2012 |
|
21/06/2013 |
Revised PSOP: Commissioning and Testing |
System Management |
Commenced |
01/03/2014 |
|
10/02/2014 |
Changes to PSOP: Facility Outages as a result of RC_2012_11: Transparency of Outage Information |
System Management |
Commenced |
07/04/2014 |
|
11/12/2013 |
Revised PSOP: Dispatch |
System Management |
Commenced |
05/03/2014 |
Procedure Change Proposals which have been Rejected
ID | Date submitted | Title | Submitter | Date of Decision |
---|---|---|---|---|
14/03/2013 |
Revised PSOP: Monitoring and Reporting Protocol |
System Management |
01/08/2013 |