The November 2021 SEC Release, due to go live on 4 November 2021, will contain DCC System impacting changes arising from SEC Modification Proposals. The following modifications are currently in scope:

Implementation date
04/11/2021
Modification Number Modification Name Stage Implementation Date Last Updated
MP180Market-wide Half-Hourly Settlement ImplementationImplemented04/11/202111/08/2025
MP164November 2021 SEC Release supporting changesImplemented04/11/202127/03/2025
MP157Removal of DUIS v1.1 and v2.0Implemented04/11/202127/03/2025
MP158Incorporation of multiple Issue Resolution Proposals into the SEC – Batch 5Implemented04/11/202127/03/2025
MP150Removing Table 28c from the GBCSImplemented04/11/202127/03/2025
MP138DCC Service Testing in ETADImplemented04/11/202130/01/2025
MP105Sending SR11.2 to Devices in Suspended StateImplemented04/11/202103/03/2025
MP090Incorporation of Non GBCS Non-Mandated Alerts into the SECImplemented04/11/202108/12/2025
MP077DCC Service FlaggingImplemented04/11/202127/03/2025
SECMP0007Firmware updates to IHDs and PPMIDsImplemented04/11/202114/02/2025
Sign Up to SEC Newsletter

By subscribing you consent to receiving the SEC newsletter.

Contact details provided will only be used to send the newsletter and not for any other purpose.

We use a tracking pixel to track engagements with our newsletter. This collects information on your device, the content you opened, and how many times you opened it. You can turn off this tracking by setting your email client to display emails as ‘text only’

The SEC newsletter will be sent bi-monthly and will provide information on SEC updates and events.