SEC v27.0 published for the November 2020 SEC Release

27 November 2020

SEC version 27.0 comes into effect on 29 November 2020 to implement the November 2020 SEC Release. This includes 18 Modification Proposals as well as the designation/re-designation of SEC Subsidiary Documents by the Department for Business, Energy and Industrial Strategy (BEIS).

More information on the BEIS Designation can be found here.


What modifications were implemented?

SECMP0062 'Northbound Application Traffic Management – Alert Storm Protection' part 2Implemented
MP080 'Managing DUIS uplifts'Implemented
MP081 'Alignment of DUIS and CHISM to reflect current DCC Processing'Implemented
MP093 'Implementing IRP511 and CRP535 to support GBCS v3.2 devices'Implemented
MP098 'Incorporation of multiple Issue Resolution Proposals into the SEC - Batch 3'Implemented
MP101 'Large Gas Meter Displays'Implemented
MP102A 'Power Outage Alerts triggered by an OTA firmware upgrade'Implemented
MP103 'DCC SOC2 Assessments'Implemented
MP110 'Aligning SEC Appendix D with DCC Processes'Implemented
MP112 'Setting the Privacy Assessment Assurance Status'Implemented
MP115 'Changes to the NCSC Good Practice Guides'Implemented
MP118 'Communications Hub Finance Charges'Implemented
MP120 'Correcting DUIS Matrix for SRV7.7 Eligible Users'Implemented
MP124 'Consequential changes to DUIS and MMC'Implemented
MP127 'SMKI RAPP Security Screening clarification'Implemented
MP131 'Default maximum demand configuration conflict'Implemented
MP133 'Consequential changes to SEC Section G'Implemented
MP142 'Clarification to the MMC'Implemented


What parts of the SEC were affected?

SEC documentAvailable on CodeWorksSEC ModificationBEIS Designation
Section A ‘Definitions and Interpretation’YesYesNo
Section G ‘Security’YesYesNo
Section I ‘Data Privacy’YesYesNo
Section J ‘Payment of Charges’YesYesNo
Section L ‘Smart Metering Key Infrastructure’YesYesNo
Schedule 8 ‘GB Companion Specification’NoYesYes
Schedule 9 ‘Smart Metering Equipment Technical Specifications’NoYesYes
Schedule 10 ‘Communications Hub Technical Specifications’NoNoYes
Schedule 11 ‘TS Applicability Tables’YesYesYes
Appendix A ‘Device Certificate Policy’NoYesNo
Appendix B ‘Organisation Certificate Policy’NoYesYes
Appendix D ‘SMKI Registration Authority Policies and Procedures’YesYesYes
Appendix E ‘DCC User Gateway Services Schedule’YesYesYes
Appendix I ‘CH Installation and Maintenance Support Materials’YesYesNo
Appendix L ‘SMKI Recovery Procedure’YesYesNo
Appendix M ‘SMKI Interface Design Specification’NoNoYes
Appendix O ‘SMKI Repository Interface Design Specification’NoNoYes
Appendix Q ‘IKI Certificate Policy’NoYesNo
Appendix AB ‘Service Request Processing Document’YesNoYes
Appendix AC ‘Inventory, Enrolment and Decommissioning Procedures’YesNoYes
Appendix AD ‘DCC User Interface Specification’NoYesYes
Appendix AF ‘Message Mapping Catalogue’NoYesYes


Where can I access the legal text?

The redlined changes for the documents available on CodeWorks can be found via the links below:


The combined SECAS and BEIS redlining for those documents which are not yet available via CodeWorks can be found here.

We have prepared full marked-up versions of the Smart Metering Equipment Technical Specifications 2 (SMETS2) version 29 November 2020 and the GB Companion Specification (GBCS) version 4.0 against the previously published versions. The mark-up includes commentary identifying whether the changes were made by BEIS changes or SEC Modifications. These are available on our November 2020 SEC Release page.

Our Document Log lists the versions of each SEC document now in effect following this release.

You can download clean versions of the individual SEC documents from the SEC and Supporting Documents section of our website or via CodeWorks.


Where can I find further information?

If you have any questions, you can call the SECAS Helpdesk at 020 7090 7755 or email