SEC designation implemented

18 September 2020

The Department for Business, Energy and Industrial Strategy (BEIS) issued a designation that was effective from the 17 September 2020. This is to support the Data Communications Company’s (DCC’s) Smart Metering Equipment Specifications 1 (SMETS1) service and the smart metering rollout more generally. These changes were incorporated into the SEC on 18 September 2020.

The BEIS designation letter and accompanying annexes, including the redlined changes, can be found here.


What parts of the SEC were affected?

  • SEC Section A ‘Definitions and Interpretation’
  • SEC Appendix AL ‘SMETS1 Transition and Migration Approach Document’
  • SEC Appendix AO ‘S1SPKM Compliance Policy’
  • SEC Appendix AP ‘S1SPKI Certificate Policy’


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

You can download 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