Guide intended to complement the Energy Code Modification Rules and to assist in understanding the procedural framework.



This guidance was originally published by the Competition Commission (CC) and has been adopted by the CMA Board. The original text has been retained unamended, therefore it does not reflect or take account of developments in case law, legislation or practice since its original publication.

Please also note:

  • references to the Office of Fair Trading (OFT) or CC (except where referring to specific past OFT or CC practice or case law) should be read as referring to the CMA
  • references to articles of the EC Treaty should be read as referring to the equivalent articles of the Treaty on the Functioning of the European Union
  • certain OFT or CC departments, teams or individual roles may not be replicated in the CMA, or may have been renamed; the CMA’s structure is set out in our organisation chart
  • don’t use any contact details quoted within the guidance document

If you have any queries about the CMA’s processes described in the guidance, or if you’re considering lodging an appeal, please contact us at We strongly recommend that you contact us prior to making an application.