Updated rules and guide for energy code modification appeals

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The Competition and Markets Authority's (CMA) purpose is to help people, businesses and the UK economy by protecting competition and tackling unfair behaviour.



Consultation response and final guidance published

We have published our final guidance and consultation responses, following our first consultation in July 2024 and a second consultation in November 2024.

The updated procedural rules and guidance for energy code modification appeals replace the prior rules (CC10) and guide (CC11) and have been amended to:

  • reflect the updated legislative framework
  • incorporate the CMA’s experience of conducting appeals
  • align them more closely to the CMA70 rules and CMA71 guide in place for energy licence modification appeals issued in 2022
  • reflect the use of technology to reduce administrative burdens

They also take into account changes to the Energy Act 2004 introduced since this first consultation by the commencement of section 201 and Schedule 14 of the Energy Act 2023, introduced in our November consultation.


About this consultation

We are consulting on updated draft procedural rules and guidance for energy code modification appeals to replace the rules (CC10) and guide (CC11).

They also take into account changes to the Energy Act 2004 introduced since this first consultation by the commencement of section 201 and Schedule 14 of the Energy Act 2023, introduced in our November consultation.


Your personal data

Your name and contact details are your personal data. In collecting, receiving, storing, accessing and using your personal data, the CMA, as controller, is processing your personal data. The CMA processes personal data in accordance with data protection law. The CMA is processing your personal data so that it can contact you again, should it need further help or information from you, in order to carry out its merger work under Part 3 of the Enterprise Act 2002.

For more information about how the CMA processes personal data and your rights relating to that data, read our privacy notice.



The Competition and Markets Authority's (CMA) purpose is to help people, businesses and the UK economy by protecting competition and tackling unfair behaviour.



Consultation response and final guidance published

We have published our final guidance and consultation responses, following our first consultation in July 2024 and a second consultation in November 2024.

The updated procedural rules and guidance for energy code modification appeals replace the prior rules (CC10) and guide (CC11) and have been amended to:

  • reflect the updated legislative framework
  • incorporate the CMA’s experience of conducting appeals
  • align them more closely to the CMA70 rules and CMA71 guide in place for energy licence modification appeals issued in 2022
  • reflect the use of technology to reduce administrative burdens

They also take into account changes to the Energy Act 2004 introduced since this first consultation by the commencement of section 201 and Schedule 14 of the Energy Act 2023, introduced in our November consultation.


About this consultation

We are consulting on updated draft procedural rules and guidance for energy code modification appeals to replace the rules (CC10) and guide (CC11).

They also take into account changes to the Energy Act 2004 introduced since this first consultation by the commencement of section 201 and Schedule 14 of the Energy Act 2023, introduced in our November consultation.


Your personal data

Your name and contact details are your personal data. In collecting, receiving, storing, accessing and using your personal data, the CMA, as controller, is processing your personal data. The CMA processes personal data in accordance with data protection law. The CMA is processing your personal data so that it can contact you again, should it need further help or information from you, in order to carry out its merger work under Part 3 of the Enterprise Act 2002.

For more information about how the CMA processes personal data and your rights relating to that data, read our privacy notice.



  • CLOSED: This survey has concluded.
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Page last updated: 15 Jan 2025, 01:02 PM