SEC designation implemented

24 July 2020

An updated version of the SEC came into effect on 24 July 2020 to implement a designation by the Department for Business, Energy and Industrial Strategy (BEIS). This is to support the Data Communications Company (DCC) Smart Metering Equipment Specifications 1 (SMETS1) service.

The BEIS designation letter and accompanying annexes can be found here.


What parts of the SEC were affected?

  • SEC Appendix AL ‘SMETS1 Transition and Migration Approach Document’
  • SEC Appendix AM ‘SMETS1 Supporting Requirements’


The redlined changes for both documents can be found here.

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