PSN Code of Interconnection (CoICo)

Use this form if you're a commercial supplier that wants to renew or get a PSN connectivity compliance certificate.


PSN Code of Interconnection (CoICo) v1.21

This file is in an OpenDocument format

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email Please tell us what format you need. It will help us if you say what assistive technology you use.


Complete this form if you’re a commercial supplier organisation applying to provide connectivity services to public sector organisations connected to the PSN.

You can then submit your application to us using the PSN team contact centre online portal.

Published 12 March 2015
Last updated 26 May 2015 + show all updates
  1. This page has been revised to reflect updates to the PSN compliance process.

  2. First published.