Energy code timetable

Energy codes can be changed or updated, for example to remove specific requirements.

We approve or reject energy code modifications. The outcome and reason for each change is published in the list of energy code publications.

You can get further information on proposed changes to energy codes on the Code Administration Code of Practice website.

This page is updated at the end of each calendar month. 

Energy code proposed changes

Proposed changes to energy codes that we are reviewing and dates we aim to decide the outcome.

Balancing and Settlement Code (BSC)

Elexon is the Code Administrator for the Balancing and Settlement Code. 

Decisions pending

P494: Establishing a Smart Data Repository (SDR)
Decision date: 7 September 2026

P515: Enabling the Delay of Settlement and Payment Runs 
Decision date: to be announced 

Carbon Capture and Storage Network Code (CCS N Code)

The CCS (Carbon Capture and Storage) Network Code body manages the CCS N Code. 

Decisions pending

There are no modifications to the CCS N Code with us for decision. 

Connection and Use of System Code (CUSC)

The National Energy System Operator (NESO) is the organisation responsible for the Connection and Use of System Code.  

Decisions pending

CMP453: To Bill BSUoS on a net basis at BSC Trading Units
Decision date: 30 September 2026

CMP315: TNUoS: Review of the expansion constant and the elements of the transmission system charged for 
Decision date: to be announced

CMP316: Inclusion of Virtual Trading Parties as Performance Assurance Parties
Decision date: to be announced

CMP330: Allowing new Transmission Connected parties to build Connection Assets greater than 2km in length 
Decision date: to be announced 

CMP374: Extending contestability for Transmission Connections 
Decision date: to be announced 

CMP375: Enduring Expansion Constant & Expansion Factor Review 
Decision date: to be announced 

CMP397:  Consequential changes required to CUSC Exhibits B and D to reflect CMP316 (Co-Located Generation Sites) 
Decision date: to be announced

CMP417:  Extending principles of CUSC Section 15 to all Users
Decision date: to be announced

CMP423:  Ensuring non-BM Balancing Services providers pay for non-delivery imbalances at a price that reflects the real-time value of energy
Decision date: to be announced

CMP445: Pro-rating first year TNUoS for Generators
Decision date: to be announced

CMP440: Re-introduction of Demand TNUoS locational signals by removal of the zero price floor
Decision date: to be announced

CMP469: GC0186 Cost Recovery mechanism for CUSC Parties
Decision date: to be announced 

Distribution Code (DCode)

The Energy Networks Association is the body responsible for the Distribution Code. 

Decisions pending

There are no modifications to the DCode with us for decision.

Distribution Connection and Use of System Code (DCUSA)

Electralink is the body responsible for the Distribution and Use of System Agreement.

Decisions pending

DCP412: Discounts from TCR charges for ‘peaky’ final demand customers 
Decision date: 7 September 2026 

DCP466: Tariff Band to follow capacity 
Decision date: 14 September 2026 

DCP452: Correct application of Forward Cost Pricing EDCM charges to users connected directly to a Grid Supply Point 
Decision date: to be announced 

Grid Code (GC)

NESO is the body responsible for the Grid Code. 

Decisions pending

There are no modifications to the Grid Code with us for decision. 

Independent Gas Transporters Uniform Network Code (IGT UNC)

The Independent Gas Transporters’ (IGT) Uniform Network Code (UNC) is the body responsible for the Independent Gas Transporters Uniform Network Code. 

Decisions pending

CSL01: Exclusion of Standalone Networks from IGT UNC
Decision date: 30 September 2026  

Retail Energy Code (REC)

The Retail Energy Code Company limited is the body responsible for the Retail Energy Code. 

Decisions pending

R0332: Amend the REC to permit RECCo to undertake additional code manager activities
Decision Date: 28 September 2026 

Smart Energy Code (SEC)

The Smart Energy Code Company houses the Smart Energy Code Administrator and Secretariat. SECCo is the body responsible for the Smart Energy Code. 

Decisions pending

There are no modifications to the SEC with us for decision. 

Security and Quality of Supply Standard (SQSS)

NESO is the body responsible for the Security and Quality of Supply Standard. 

Decisions pending

GSR037: Formatting and Housekeeping
Decision date: 18 September

GSR036: System Access Reform Review of the voltage limits
Decision date: 2 October 2026

System Operator Transmission Owner Code (STC)

NESO is the body responsible for the System Operator - Transmission Owner Code. 

Decisions pending

CM078: STC change for CUSC Modification CMP328 - Connection Trigger Distribution Impact Assessment 
Decision date: to be announced

CM093: Extending the principles of the User Commitment Methodology to Final Sums Methodology as a consequence of CUSC Modification – CMP417 
Decision date: to be announced

CM097: EMT and RMS Model Submission for TOs
Decision date: to be announced 

Uniform Network Code (UNC)

The Joint Office of Gas Transporters is the body responsible for the Uniform Network Code.  

Decisions pending

UNC920: PARCA Security Amount
Decision date: 16 October 2026 

UNC0903: The Introduction of a Single NTS Capacity Reference Price 
Decision date: 14 December 2026  

UNC0894/A: Facilitating Biomethane entry into the GDN by exporting methane from the GDN into the NTS via Compression 
Decision date: to be announced 

UNC0900: Amendment to the Gas Quality NTS Entry Specification at Biomethane System Entry Points 
Decision date: to be announced  

UNC0915: Debt Relief Scheme Payments (DRSP)s 
Decision date: to be announced