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144175MARKET SYSTEMS01/06/2026 08:07:01 AM
Completed - CHG0110463 - MSATS 57.0 Flexible Trading Arrangement (FTA Release 1)
Change Number: CHG0110463
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 57.0 Flexible Trading Arrangement (FTA Release 1)
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: MSATS - Market Settlement & Transfer System
Change Title: MSATS 57.0 Flexible Trading Arrangement (FTA Release 1)
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
144174MARKET SYSTEMS01/06/2026 08:00:10 AM
Completed - CHG0110834 - Planned maintenance to Cisco ISE Servers
Change Number: CHG0110834
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Local Area Network
Change Title: Planned maintenance to Cisco ISE Servers
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Local Area Network
Change Title: Planned maintenance to Cisco ISE Servers
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
144173MARKET SYSTEMS01/06/2026 07:48:08 AM
Completed - CHG0106232 - Scheduled maintenance of Marketnet Firewall in Norwest
Change Number: CHG0106232
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Local Area Network
Change Title: Scheduled maintenance of Marketnet Firewall in Norwest
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
Notification issued to: Market Notice
Notification Type: Completed
Change Type: Normal
Service/Component: Local Area Network
Change Title: Scheduled maintenance of Marketnet Firewall in Norwest
Support Information: Report any impacts to the AEMO Information and Support Hub or on External 1300 236 600.
144172MARKET INTERVENTION31/05/2026 11:15:08 PM
Cancellation: Direction issued to: Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
AEMO ELECTRICITY MARKET NOTICE
Cancellation: Direction issued to: Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
Refer to Market Notice 144169
Direction is cancelled from: 2315 hrs 31/05/2026
Manager NEM Real Time Operations
Cancellation: Direction issued to: Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
Refer to Market Notice 144169
Direction is cancelled from: 2315 hrs 31/05/2026
Manager NEM Real Time Operations
144171MARKET INTERVENTION31/05/2026 11:15:28 PM
Cancellation - AEMO Intervention Event - SA region 31/05/2026
AEMO ELECTRICITY MARKET NOTICE
Cancellation - AEMO Intervention Event - SA region 31/05/2026
Refer to Market Notice 144170
The AEMO Intervention Event and all associated directions are cancelled from 2315 hrs on 31/05/2026.
Manager NEM Real Time Operations
Cancellation - AEMO Intervention Event - SA region 31/05/2026
Refer to Market Notice 144170
The AEMO Intervention Event and all associated directions are cancelled from 2315 hrs on 31/05/2026.
Manager NEM Real Time Operations
144170MARKET INTERVENTION31/05/2026 09:54:31 PM
Direction - SA region 31/05/2026
AEMO ELECTRICITY MARKET NOTICE
Direction - SA region 31/05/2026
In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
The issue of the direction commences an AEMO intervention event. AEMO declares all trading intervals during the event to be intervention trading intervals, commencing from the interval ending 2150 hrs on 31/05/2026.
Intervention pricing does not apply to this AEMO intervention event.
AEMO may issue or revoke additional directions in order to meet the current requirement, unless sufficient market response is provided. A further market notice will be issued when all directions related to this requirement have been cancelled.
Manager NEM Real Time Operations
Direction - SA region 31/05/2026
In accordance with section 116 of the National Electricity Law, AEMO has issued a direction to a participant in the SA region. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
The issue of the direction commences an AEMO intervention event. AEMO declares all trading intervals during the event to be intervention trading intervals, commencing from the interval ending 2150 hrs on 31/05/2026.
Intervention pricing does not apply to this AEMO intervention event.
AEMO may issue or revoke additional directions in order to meet the current requirement, unless sufficient market response is provided. A further market notice will be issued when all directions related to this requirement have been cancelled.
Manager NEM Real Time Operations
144169MARKET INTERVENTION31/05/2026 09:53:51 PM
Direction - in SA region to Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
AEMO ELECTRICITY MARKET NOTICE
Direction - in SA region to Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
In accordance with section 116 of the National Electricity Law, AEMO is issuing a direction to Origin Energy Electricity Limited. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
Direction issued to: Origin Energy Electricity Limited - QUARANTINE PS UNIT 5 at 2145hrs 31/05/2026
Type of resource: generating unit
Required actions: Remain Synchronised and follow dispatch targets at 2200 hrs 31/05/2026
Services provided: Voltage Control
Circumstances necessitating the Direction: Voltage
Circumstances necessitating the Direction additional detail: The synchronous generating units currently expected to be synchronised in SA will be inadequate to maintain sufficient Voltage Control in SA. Intervention is required to maintain the power system in a secure operating state
Expected duration: 2330 hrs 31/05/2026.
Origin Energy Electricity Limited does not incur any civil monetary liability for a relevant action taken in accordance with this direction unless the action is taken in bad faith.
Manager NEM Real Time Operations
Direction - in SA region to Origin Energy Electricity Limited - QUARANTINE PS UNIT 5
In accordance with section 116 of the National Electricity Law, AEMO is issuing a direction to Origin Energy Electricity Limited. For the purposes of the National Electricity Rules this is a direction under clause 4.8.9(a1)(1).
Direction issued to: Origin Energy Electricity Limited - QUARANTINE PS UNIT 5 at 2145hrs 31/05/2026
Type of resource: generating unit
Required actions: Remain Synchronised and follow dispatch targets at 2200 hrs 31/05/2026
Services provided: Voltage Control
Circumstances necessitating the Direction: Voltage
Circumstances necessitating the Direction additional detail: The synchronous generating units currently expected to be synchronised in SA will be inadequate to maintain sufficient Voltage Control in SA. Intervention is required to maintain the power system in a secure operating state
Expected duration: 2330 hrs 31/05/2026.
Origin Energy Electricity Limited does not incur any civil monetary liability for a relevant action taken in accordance with this direction unless the action is taken in bad faith.
Manager NEM Real Time Operations
144164MARKET SYSTEMS29/05/2026 03:08:27 PM
Initial - CHG0110742 - Renewal and update of AEMO's FRC Relay server certificate
Change Number: CHG0110742
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Gas Hub
Change Title: Renewal and update of AEMO's FRC Relay server certificate.
Change Start Date & Time: 07/06/2026 10:00:00
Change End Date & Time: 21/06/2026 14:00:00
Outage Start Date & Time: 21/06/2026 10:00:00
Outage End Date & Time: 21/06/2026 14:00:00
Environment: Production
Participant Impact and Requirements: AEMO's FRC Gas Hub web services need to have their server certificates updated every 3 years with new certificates to replace expiring ones.
Participants connecting to these endpoints or receiving requests from AEMO's FRC Gas Hub platforms and have authorisation mechanisms like certificate fingerprinting in place will notice a change in AEMO's server's certificate fingerprint and will need to update their systems accordingly.
The certificate relates to the FRC HUB RELAY, participants WILL need to update the profile that communicates with the FRC HUB RELAY with the new FRC-HUB-RELAY-Prod certificates.
This will need to be done to avoid the inability to send messages to the relay.
The certificates can be downloaded from the link below:
https://www.digicert.com/secure/download-certificate/9wzmqbbws80c42w80hfnvcjvbhgm29v
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Gas Hub
Change Title: Renewal and update of AEMO's FRC Relay server certificate.
Change Start Date & Time: 07/06/2026 10:00:00
Change End Date & Time: 21/06/2026 14:00:00
Outage Start Date & Time: 21/06/2026 10:00:00
Outage End Date & Time: 21/06/2026 14:00:00
Environment: Production
Participant Impact and Requirements: AEMO's FRC Gas Hub web services need to have their server certificates updated every 3 years with new certificates to replace expiring ones.
Participants connecting to these endpoints or receiving requests from AEMO's FRC Gas Hub platforms and have authorisation mechanisms like certificate fingerprinting in place will notice a change in AEMO's server's certificate fingerprint and will need to update their systems accordingly.
The certificate relates to the FRC HUB RELAY, participants WILL need to update the profile that communicates with the FRC HUB RELAY with the new FRC-HUB-RELAY-Prod certificates.
This will need to be done to avoid the inability to send messages to the relay.
The certificates can be downloaded from the link below:
https://www.digicert.com/secure/download-certificate/9wzmqbbws80c42w80hfnvcjvbhgm29v
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
144163MARKET SYSTEMS29/05/2026 03:03:47 PM
Initial - CHG0110902 - Renewal and update of FBS-Prod-Hub.aemo.com.au server certificate.
Change Number: CHG0110902
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MSATS - Business to Business data exchange
Change Title: Renewal and update of FBS-Prod-Hub.aemo.com.au server certificate.
Change Start Date & Time: 10/06/2026 10:00:00
Change End Date & Time: 14/06/2026 14:00:00
Outage Start Date & Time: 14/06/2026 10:00:00
Outage End Date & Time: 14/06/2026 14:00:00
Environment: Production
Participant Impact and Requirements: AEMO's FRC Gas Hub web services need to have their server certificates updated every year with new certificates to replace the expiring one.
Participants connecting to these endpoints or receiving requests from AEMO's FRC Gas Hub platforms and have authorisation mechanisms like certificate fingerprinting in place will notice a change in AEMO's server's certificate fingerprint and will need to update their systems accordingly.
The certificate relates to "FBS-Prod-Hub.aemo.com.au" certificate and relates to the following domains.
FBS-Prod-Hub.aemo.com.au
apis.prod.aemo.com.au
hub.aemo.com.au
prod.frchub.net
apis.prod.marketnet.net.au
hub.marketnet.net.au
Participants WILL need to update the profile that communicates with the above domains.
This will need to be done to avoid the inability to send messages to the relay.
The certificates can be downloaded from the link below:
https://www.digicert.com/secure/download-certificate/0smqgzf16rvghy1j7qsns4fhlctjzjd
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.
Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: MSATS - Business to Business data exchange
Change Title: Renewal and update of FBS-Prod-Hub.aemo.com.au server certificate.
Change Start Date & Time: 10/06/2026 10:00:00
Change End Date & Time: 14/06/2026 14:00:00
Outage Start Date & Time: 14/06/2026 10:00:00
Outage End Date & Time: 14/06/2026 14:00:00
Environment: Production
Participant Impact and Requirements: AEMO's FRC Gas Hub web services need to have their server certificates updated every year with new certificates to replace the expiring one.
Participants connecting to these endpoints or receiving requests from AEMO's FRC Gas Hub platforms and have authorisation mechanisms like certificate fingerprinting in place will notice a change in AEMO's server's certificate fingerprint and will need to update their systems accordingly.
The certificate relates to "FBS-Prod-Hub.aemo.com.au" certificate and relates to the following domains.
FBS-Prod-Hub.aemo.com.au
apis.prod.aemo.com.au
hub.aemo.com.au
prod.frchub.net
apis.prod.marketnet.net.au
hub.marketnet.net.au
Participants WILL need to update the profile that communicates with the above domains.
This will need to be done to avoid the inability to send messages to the relay.
The certificates can be downloaded from the link below:
https://www.digicert.com/secure/download-certificate/0smqgzf16rvghy1j7qsns4fhlctjzjd
Support Information:
Report any impacts to the AEMO Information and Support Hub or call 1300 236 600.
Please refer to https://aemo.service-now.com/participantportal?id=pp_services_status for any planned/unplanned maintenance activities.