Initial - CHG0109135 - Planned System Outage Notification � Electricity MMS Production Bay Transfer

Change Number: CHG0109135

Notification issued to: Market Notice
Notification Type: Initial
Change Type: Normal
Service/ Component: Electricity Market Management System
Change Title: Planned System Outage Notification � Electricity MMS Production Bay Transfer
Change Start Date & Time: 01/10/2026 08:00:00
Change End Date & Time: 09/10/2026 20:00:00
Outage Start Date & Time: 06/10/2026 18:00:00
Outage End Date & Time: 06/10/2026 19:00:00
Environment: Production

Participant Impact and Requirements: EMMS Production Systems will be transferred to the alternative datacentre for maintenance activities.
          o	Please note that this activity is being performed between 18:00 to 19:00 AEST on 6th October 2026.
          o	During the window, delivery of FPP calculations through the participant data model may be delayed at various points.
          o	Gas Supply Hub (GSH) Services will be intermittently unavailable at this time.
          o	The Market Portal Services will be intermittently unavailable at this time.

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.