1
Development Stage
2
Refinement Process
3
Report Phase
4
Pending Implementation
5
Implemented
Proposer
SMS Plc - David Lane
Priority
High
Lead Analyst
Date raised
05/10/2023
Last Updated
17/02/2026
Stage
Implemented
Implementation date
06/11/2025
Impacted Parties
Large Suppliers, Small Suppliers, DCC, Electricity Network Parties, Gas Network Parties, Device Manufacturers, Other SEC Parties, DCC Other Users, Shared Resource Providers, Flexibility Providers, Meter Installers, Registered Supplier Agents
Impacted Documents
SEC Appendix I - CH Installation and Maintenance Support, SEC Section A - Definitions and Interpretation, SEC Section F - Smart Metering System Requirements, SEC Appendix AD – DCC User Interface Specification (DUIS), SEC Appendix Q - IKI Certificate Policy
Governance
Self Governance
Change Board decision
Approve
Latest Update

This modification was implemented in the November 2025 SEC Release (Thursday 6 November 2025).

Following the Change Board decision to approve MP252 for implementation in November 2025 SEC Release, SECAS has been made aware there may be a delay in the implementation and any post-decision issues will now be managed by the Operations Group (OPSG).

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