SEC v31.0 released to implement MP139

21 January 2021

An updated version of the SEC came into effect on 21 January 2021 to implement MP139 ‘MVP and IVP dates for CHTS’.

MP139 extends Communications Hub Technical Specification (CHTS) v1.0 and v1.1 end dates in the Technical Specifical Applicability Tables (TSAT) by 12 months. This will allow Suppliers more time to install or upgrade their currently held stocks of Communications Hubs.


What parts of the SEC were affected?

The following part of the SEC was affected:

  • SEC Schedule 11 ‘TS Applicability Tables’


Where can I access the redlining?

The redlined changes to this Schedule 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?

Further information can be found on the MP139 page of our website. If you have any questions, you can call the SECAS Helpdesk at 020 7090 7755 or email