SEC designation implemented

1 July 2020

An updated version of the SEC came into effect on 1 July 2020 to implement a designation by the Department for Business, Energy and Industrial Strategy (BEIS).

BEIS have designated the SEC Variation Testing Approach Document (SVTAD) to incorporate BEIS Changes included in the November 2020 SEC Release. The document has been designated ‘Appendix AN’. This includes a consequential change to Section A ‘Definitions and Interpretation’.

The SVTAD for the November 2020 SEC Release sets out the framework for the testing of BEIS-directed changes. It also sets out the requirements that apply to the development of the November 2020 Data Communications Company (DCC) Testing Approach Document (TAD), which presents that testing in more detail.

The BEIS designation letter and SVTAD can be found here.


What parts of the SEC were affected?

  • Section A ‘Definitions and Interpretation’
  • SEC Appendix AN ‘SEC Variation Testing Approach Document’ for BEIS Changes included in the November 2020 SEC Release’


Where can I access the redlining?

The redlined changes to Section A can be found on CodeWorks via the links below:


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