SEC Version 5.17 Designated

5 June 2018

SEC v5.17 came into effect on 5th June 2018. This follows consultation by BEIS on incorporating Great Britain Companion Specification (GBCS) versions 2.1 and 3.1 into the SEC and re-designating DCC User Interface Specification (DUIS) version 2.0 and the TS Applicability Tables.

To avoid the potential for confusion and the possibility of a superseded version of a document being mistakenly used in the future, BEIS has also re-designated GBCS version 3.0 within Schedule 8, the content of which simply explains that the document has been superseded by GBCS version 3.1.

You can download a zip folder containing SEC v5.17 here, or download the individual sections of the SEC from the SEC and Guidance Documents page of our website. You can download a copy of the redlined changes here.

If you have any questions or would like to discuss the changes to the SEC further, please contact us on 020 7090 7755 or email