The Smart Energy Code (SEC) was first designated on 23 September 2013 following the granting of the DCC Licence. The latest version of the Consolidated SEC is available below. For a more user-friendly version of the SEC, please see The Digital SEC.
The Digital SEC
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SEC Document Log
The SEC Document Log lists all SEC documents and their current version, allowing you to easily see the latest versions of the SEC. It also sets out:
- An impact matrix showing all the modifications currently in progress and which documents they impact; and
- A version history for each individual SEC document.
SEC Documents
- SEC Sections
- SEC Subsidiary Documents
- Code Required Documents
- SEC Section Guidance
| Document | Effective | Download |
| SEC - Version Control | 02/11/2023 | Download |
| SEC - Cover Page, Introduction and Contents | 02/11/2023 | Download |
| SEC Section A - Definitions and Interpretation | 02/11/2023 | Download |
| SEC Section B - Accession | 17/11/2021 | Download |
| SEC Section C - Governance | 03/11/2022 | Download |
| SEC Section D - Modification Process | 08/06/2023 | Download |
| SEC Section E - Registration Data | 23/02/2023 | Download |
| SEC Section F - Smart Metering System Requirements | 29/06/2023 | Download |
| SEC Section G - Security | 02/11/2023 | Download |
| SEC Section H - DCC Services | 02/11/2023 | Download |
| SEC Section I - Data Privacy | 02/11/2023 | Download |
| SEC Section J - Charges | 03/11/2022 | Download |
| SEC Section K - Charging Methodology | 08/06/2023 | Download |
| SEC Section L - Smart Metering Key Infrastructure and DCC Key Infrastructure | 11/09/2023 | Download |
| SEC Section M - General | 08/06/2023 | Download |
| SEC Section N - SMETS1 Meters | 18/09/2020 | Download |
| SEC Section P - Production Proving | 03/11/2022 | Download |
| SEC Section T - Testing During Transition | 23/02/2023 | Download |
| SEC Section X - Transition | 08/06/2023 | Download |
| SEC Section Z - Alt HAN Arrangements | 23/02/2023 | Download |
| Document | Effective | Download |
| SEC Schedule 1 - Framework Agreement | 23/09/2013 | Download |
| SEC Schedule 2 - Accession Agreement | 23/09/2013 | Download |
| SEC Schedule 3 - Specimen Bilateral Letter | 23/09/2013 | Download |
| SEC Schedule 4 - SECCo | 23/09/2013 | Download |
| SEC Schedule 5 - Accession Information | 03/11/2022 | Download |
| SEC Schedule 6 - Specimen Form of Letter of Credit | 03/11/2022 | Download |
| SEC Schedule 7 - Specimen Enabling Services Agreement | 03/11/2022 | Download |
| SEC Schedule 8 - GB Companion Specification v1.0 | 29/11/2017 | Download |
| SEC Schedule 8 - GB Companion Specification v1.1 | 29/11/2017 | Download |
| SEC Schedule 8 - GB Companion Specification v2.0 | 01/02/2018 | Download |
| SEC Schedule 8 - GB Companion Specification v2.1 | 05/06/2018 | Download |
| SEC Schedule 8 - GB Companion Specification v3.0 | 05/06/2018 | Download |
| SEC Schedule 8 - GB Companion Specification v3.1 | 04/07/2019 | Download |
| SEC Schedule 8 - GB Companion Specification v3.2 | 04/07/2019 | Download |
| SEC Schedule 8 - GB Companion Specification v3.3 | 03/11/2022 | Download |
| SEC Schedule 8 - GB Companion Specification v4.0 | 29/11/2020 | Download |
| SEC Schedule 8 - GB Companion Specification v4.1 | 04/11/2021 | Download |
| SEC Schedule 8 - GB Companion Specification v4.2 | 03/11/2022 | Download |
| SEC Schedule 8 - GB Companion Specification v4.3 | 02/11/2023 | Download |
| SEC Schedule 9 - Smart Metering Equipment Technical Specifications 1 - 1 Feb 2018 | 18/09/2020 | Download |
| SEC Schedule 9 - Smart Metering Equipment Technical Specifications 2 - 1 Feb 2018 | 18/09/2020 | Download |
| SEC Schedule 9 - Smart Metering Equipment Technical Specifications 2 - 8 Nov 2018 | 18/09/2020 | Download |
| SEC Schedule 9 - Smart Metering Equipment Technical Specifications 2 - 4 Jul 2019 | 18/09/2020 | Download |
| SEC Schedule 9 - Smart Metering Equipment Technical Specifications 2 - 29 Nov 2020 | 29/11/2020 | Download |
| SEC Schedule 9 - Smart Metering Equipment Technical Specifications 2 - 4 Nov 2021 | 04/11/2021 | Download |
| SEC Schedule 9 - Smart Metering Equipment Technical Specifications 2 - 3 Nov 2022 | 03/11/2022 | Download |
| SEC Schedule 9 - Smart Metering Equipment Technical Specifications 2 - 2 Nov 2023 | 02/11/2023 | Download |
| SEC Schedule 10 - Communications Hub Technical Specifications v1.0 | 29/11/2017 | Download |
| SEC Schedule 10 - Communications Hub Technical Specifications v1.1 | 01/02/2018 | Download |
| SEC Schedule 10 - Communications Hub Technical Specifications v1.2 | 04/07/2019 | Download |
| SEC Schedule 10 - Communications Hub Technical Specifications v1.3 | 04/07/2019 | Download |
| SEC Schedule 10 - Communications Hub Technical Specifications v1.4 | 29/11/2020 | Download |
| SEC Schedule 10 - Communications Hub Technical Specifications v1.5 | 04/11/2021 | Download |
| SEC Schedule 10 - Communications Hub Technical Specifications v1.6 | 03/11/2022 | Download |
| SEC Schedule 11 - TS Applicability Tables | 02/11/2023 | Download |
| SEC Appendix A - Device Certificate Policy | 02/11/2023 | Download |
| SEC Appendix B - Organisation Certificate Policy | 02/11/2023 | Download |
| SEC Appendix C - SMKI Compliance Policy | 02/11/2023 | Download |
| SEC Appendix D - SMKI Registration Authority Policies and Procedures | 02/11/2023 | Download |
| SEC Appendix E - DCC User Interface Services Schedule | 29/06/2023 | Download |
| SEC Appendix F - Minimum Communication Services for SMETS1 Meters | 29/11/2017 | Download |
| SEC Appendix G - DCC Gateway Connection Code of Connection | 03/11/2022 | Download |
| SEC Appendix H - CH Handover Support Materials | 03/11/2022 | Download |
| SEC Appendix I - CH Installation and Maintenance Support Materials | 03/11/2022 | Download |
| SEC Appendix J - Enduring Testing Approach Document | 03/11/2022 | Download |
| SEC Appendix K - SMKI and Repository Test Scenarios Document | 23/02/2023 | Download |
| SEC Appendix L - SMKI Recovery Procedure | 22/03/2023 | Download |
| SEC Appendix M - SMKI Interface Design Specification | 24/02/2022 | Download |
| SEC Appendix N - SMKI Code of Connection | 24/02/2022 | Download |
| SEC Appendix O - SMKI Repository Interface Design Specification | 03/11/2022 | Download |
| SEC Appendix P - SMKI Repository Code of Connection | 24/02/2022 | Download |
| SEC Appendix Q - IKI Certificate Policy | 02/11/2023 | Download |
| SEC Appendix R - Common Test Scenarios Document | 24/06/2021 | Download |
| SEC Appendix S - DCCKI Certificate Policy | 03/11/2022 | Download |
| SEC Appendix T - DCCKI Interface Design Specification | 24/02/2022 | Download |
| SEC Appendix U - DCCKI Repository Interface Design Specification | 24/02/2022 | Download |
| SEC Appendix V - DCCKI CoCo and DCCKI Repository CoCo | 24/02/2022 | Download |
| SEC Appendix W - DCCKI Registration Authority Policies and Procedures | 02/11/2023 | Download |
| SEC Appendix X - Registration Data Interface Specification | 03/11/2022 | Download |
| SEC Appendix Y - Registration Data Interface Code of Connection | 18/07/2022 | Download |
| SEC Appendix Z - CPL Requirements Document | 29/06/2023 | Download |
| SEC Appendix AA - Threshold Anomaly Detection Procedures | 29/06/2023 | Download |
| SEC Appendix AB - Service Request Processing Document | 29/06/2023 | Download |
| SEC Appendix AC - Inventory, Enrolment and Decommissioning Procedures | 29/06/2023 | Download |
| SEC Appendix AD - DCC User Interface Specification v1.1 | 01/11/2018 | Download |
| SEC Appendix AD - DCC User Interface Specification v2.0 | 05/06/2018 | Download |
| SEC Appendix AD - DCC User Interface Specification v3.0 | 28/07/2019 | Download |
| SEC Appendix AD - DCC User Interface Specification v3.1 | 29/11/2019 | Download |
| SEC Appendix AD - DCC User Interface Specification v4.0 | 29/11/2020 | Download |
| SEC Appendix AD - DCC User Interface Specification v5.0 | 04/11/2021 | Download |
| SEC Appendix AD - DCC User Interface Specification v5.1 | 30/06/2022 | Download |
| SEC Appendix AD - DCC User Interface Specification v5.2 | 29/06/2023 | Download |
| SEC Appendix AE - DCC User Interface Code of Connection | 29/11/2017 | Download |
| SEC Appendix AF - Message Mapping Catalogue v1.0 | 29/11/2017 | Download |
| SEC Appendix AF - Message Mapping Catalogue v2.0 | 01/02/2018 | Download |
| SEC Appendix AF - Message Mapping Catalogue v3.0 | 28/07/2019 | Download |
| SEC Appendix AF - Message Mapping Catalogue v3.1 | 29/11/2019 | Download |
| SEC Appendix AF - Message Mapping Catalogue v4.0 | 29/11/2020 | Download |
| SEC Appendix AF - Message Mapping Catalogue v5.0 | 04/11/2021 | Download |
| SEC Appendix AF - Message Mapping Catalogue v5.1 | 30/06/2022 | Download |
| SEC Appendix AF - Message Mapping Catalogue v5.2 | 29/06/2023 | Download |
| SEC Appendix AG - Incident Management Policy | 02/11/2023 | Download |
| SEC Appendix AH - Self Service Interface Access Control Specification | 28/07/2019 | Download |
| SEC Appendix AI - Self Service Interface Code of Connection | 03/11/2022 | Download |
| SEC Appendix AJ - SEC Variation Testing Approach Document | 23/02/2023 | Download |
| SEC Appendix AK - SEC Variation Testing Approach Document for SMETS1 Services | 10/06/2022 | Download |
| SEC Appendix AL - SMETS1 Transition and Migration Approach Document | 15/09/2023 | Download |
| SEC Appendix AM - SMETS1 Supporting Requirements | 23/05/2023 | Download |
| SEC Appendix AM - Annex A - Device Model Variations to Equivalent Steps Matrix | 23/05/2023 | Download |
| SEC Appendix AN - SEC Variation Testing Approach Document for BEIS Changes included in the November 2020 SEC Release | 03/11/2022 | Download |
| SEC Appendix AO - S1SPKM Compliance Policy | 03/11/2022 | Download |
| SEC Appendix AP1 - Secure S1SPKI Certificate Policy | 03/11/2022 | Download |
| SEC Appendix AP2 - FOC S1SPKI Certificate Policy | 02/11/2023 | Download |
| SEC Appendix AQ - SEC Variation Testing Approach Document for the CH&N Arrangements | 03/11/2022 | Download |
| SEC Appendix AR - SEC Variation Testing Approach Document for the Enduring Change of Supplier Arrangements | 30/07/2021 | Download |
| SEC Appendix AS - ECoS Transition and Migration Approach Document | 29/06/2023 | Download |
| SEC Appendix AT - SMETS1 Cryptographic Key Management Policy | 03/11/2022 | Download |
| Document | Effective | Download |
| ID Allocation Procedure Guidance Notes V2.0 | 28/11/2017 | Download |
| SEC Release Management Policy | 29/11/2017 | Download |
| Testing Issue Resolution Process | 12/05/2018 | Download |
| Parse and Correlate Applicability Matrix v3.0 | 03/11/2022 | Download |
| Privacy Controls Framework (PCF) v2.12 | 11/12/2017 | Download |
| SCF Part 1 - User Assessment Methodology (v2.12) | 14/06/2018 | Download |
| SCF Part 2 - User Assessment Guidance (v2.12) | 14/06/2018 | Download |
| ALCS/HCALCS Labels List v1.1 | 13/01/2021 | Download |
| User Testing Services Approach Document for SMETS1 Services | 13/01/2020 | Download |
| Migration Testing Approach Document for SMETS1 Services | 27/01/2023 | Download |
| SSI Change Governance Process v2.0 | 08/12/2021 | Download |
| System Capacity Testing Approach Document v1.0 | 03/07/2019 | Download |
| DCC User Gateway Interface Design Specification (DUGIDS) v5.2a - Clean, Tracked Change and Individual Files - 22.05.2023 | 29/11/2019 | Download |
| Traffic Management Mechanism Document v2.0 | 06/05/2020 | Download |
| Technical Specification Incompatibility Matrix v1.0 | 22/10/2020 | Download |
| DCC Performance Indicators Document v1.0 | 25/02/2021 | Download |
| SMETS1 IOC and MDS DMCT Schedule v12.0 | 20/10/2021 | Download |
| SMETS1 IOC and MDS DMCT Status List excluded from DMCT Schedule v12.0 | 20/10/2021 | Download |
| SMETS1 MOC Secure DMCT Schedule v12.0 | 29/11/2021 | Download |
| SMETS1 MOC Secure DMCT Status List Excluded from DMCT Schedule v12.0 | 29/11/2021 | Download |
| SMETS1 FOC DMCT Schedule v5.0 | 09/12/2021 | Download |
| SMETS1 FOC DMCT Status List Excluded from DMCT Schedule v5.0 | 09/12/2021 | Download |
| Power Outage & Restoration Alerts Delivery Management Document | 12/10/2022 | Download |
| ECoS Migration Reporting Regime | 29/06/2023 | Download |
| ECoS Migration Error Handling and Retry Approach | 29/06/2023 | Download |
| Document | Effective | Download |
| SEC Section A - Definitions & Interpretation | 29/11/2017 | Download |
| SEC Section B - Accession | 29/11/2017 | Download |
| SEC Section C - Governance | 29/11/2017 | Download |
| SEC Section D - Modification Process | 29/11/2017 | Download |
| SEC Section E - Registration Data | 29/11/2017 | Download |
| SEC Section F - Smart Metering System Requirements | 29/11/2017 | Download |
| SEC Section G - Security | 29/11/2017 | Download |
| SEC Section H - DCC Services Overview | 29/11/2017 | Download |
| SEC Section I - Data Privacy | 29/11/2017 | Download |
| SEC Section J - Charges | 29/11/2017 | Download |
| SEC Section K - Charging Methodology | 29/11/2017 | Download |
| SEC Section L - SMKI and DCCKI | 29/11/2017 | Download |
| SEC Section M - General | 29/11/2017 | Download |
| SEC Section N - SMETS1 Meters | 29/11/2017 | Download |
| SEC Section T - Testing during Transition | 29/11/2017 | Download |
| SEC Section X - Transition | 29/11/2017 | Download |
| SEC Section Z - Alt HAN | 29/11/2017 | Download |
Note: The ‘Effective’ date for SEC Schedules 8, 9 and 10 is the date that these were designated (or re-designated when superseded) into the SEC. For applicability dates of the different versions of these SEC Schedules, please refer to SEC Schedule 11 ‘TS Applicability Tables’.