Industry codes

The industry codes underpin the electricity and gas wholesale and retail markets. Licensees are required to maintain, become party to, or comply with the industry codes in accordance with the conditions of their licence.

Code Administrators are the point of contact for each code where users can find out information about that code, including how to become a party to the code (if appropriate) and the rules on modifying the code. Code Administrators have committed to operating their code administration functions in accordance with the Code Administration Code of Practice (CACoP).

Code Administrators, as part of their role, act as Critical Friends to code users. The role of the Critical Friend is described in CACoP as a Code Administrator who provides support to all with an interest in the code modification process and consumer representatives. The Code Administrators have identified a list of the Top 5 activities of a Critical Friend.

The Code Administrators have developed a Central Modifications Register which details all current modifications across the eleven codes. This spreadsheet is managed by the Code Administrators and updated by them monthly.

The codes define the terms under which industry participants can access the electricity and gas networks. The table below lists the codes and contact details for them.

Code Type Code Administrator Website
Balancing and Settlement Code (BSC) Electricity Elexon www.elexon.co.uk
Connection Use of System Code (CUSC) Electricity

National Grid

https://www.nationalgrideso.com/industry-information/codes
Distribution Use of System Agreement (DCUSA) Electricity Electralink www.dcusa.co.uk
Master Registration Agreement Electricity Gemserv www.mrasco.com
Grid Code Electricity National Grid https://www.nationalgrideso.com/industry-information/codes
Distribution Code Electricity Energy Networks Association www.dcode.org.uk
System Operator - Transmission Operator Code (STC) Electricity National Grid

https://www.nationalgrideso.com/industry-information/codes

Uniform Network Code (UNC) Gas Joint Office of Gas Transporters www.gasgovernance.co.uk
Independent Gas Transporter UNC (iGT UNC) Gas Gemserv www.igt-unc.co.uk
Supply Point Administration Agreement (SPAA) Gas Electralink www.spaa.co.uk
Smart Energy Code (SEC) Gas and Electricity SECAS www.smartenergycodecompany.co.uk
Retail Energy Code (REC) Gas and Electricity REC https://www.retailenergycode.co.uk/

Publications and updates

  • Published: 21st Nov 2011
  • Closed: 6th Jan 2012
  • Consultations and responses
  • 20 Associated documents
See our open letter consultation: Potential expansion of the role of Elexon.

  • Published: 29th Jul 2011
  • Other
  • 2 Associated documents
We intend to launch a consultation on the issues highlighted in the appended report.

  • Published: 25th May 2011
  • Open letters and correspondence
  • 1 Associated documents
This open letter sets out the urgency criteria Ofgem is likely to apply when deciding if a code modification proposal is to be treated as urgent.

  • Published: 25th May 2011
  • Decisions
  • 1 Associated documents
This document sets out the urgency criteria Ofgem is likely to apply when deciding if a code modification proposal is to be treated as urgent.

  • Published: 11th Mar 2011
  • Closed: 26th Apr 2011
  • Consultations and responses
  • 13 Associated documents
See our open letter consultation on Code Modification Urgency Criteria.

  • Published: 8th Jul 2010
  • Guidance
  • 1 Associated documents
This is an updated standalone version of our guidance on how the carbon costs of code change proposals should be assessed and refers to the latest carbon values to be used.

  • Published: 6th Apr 2010
  • Decisions
  • 1 Associated documents
This document sets out the types of code modification decisions which may be subject to an appeal to the Competition commission.

  • Published: 13th May 2009
  • Closed: 26th Jun 2009
  • Consultations and responses
  • 19 Associated documents
This open letter consults on further proposals for licence changes that would prevent code modification proposals which are with the Authority for decision from timing out before their proposed Decide by Dates. 51/09

  • Published: 7th Apr 2009
  • Decisions
  • 1 Associated documents
See our reasons for publishing a timetable giving indicative dates, and the names of Ofgem experts, for modifications/amendments proposals that are with Ofgem for decision.

  • Published: 18th Nov 2008
  • Closed: 12th Jan 2009
  • Consultations and responses
  • 17 Associated documents
This open letter provides views on the implications of the recent legal judgement on the transmission losses proposals. It proposes options to prevent the risk that other modification proposals may be timed-out in the future. We invite feedback.

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