You can raise a modification – or mod – when you want to propose a change to any part of the CUSC.

For more information, please contact [email protected]

Search for any current or concluded modifications by name or ID. You can sort mods by ID, name, status or date of update.

Modification status
ID Name Status Last Updated Sort ascending
CAP189 CAP189: Standard Gas Insulated Switchgear Ownership Boundaries Concluded
CAP107 CAP107 - Redefinition of Response Energy Payment (REP) for Mandatory Frequency Response Concluded
CAP091 CAP091 - Establishment and maintenance of an Unsecured Credit Allowance for Rated and Unrated Companies and the alignment of the Value at Risk calculation with current best practice. Concluded
CAP070 CAP070 - Short Term Firm Access Service Concluded
CAP043 CAP043 - Transmission Access - Definition Concluded
CAP012 CAP012 - Procedure for the renewal of NGC (Connection) assets Concluded
CMFTP230 CMFTP230: Minor Housekeeping Changes and Corrections Concluded
CMP228 CMP228: Definition of Qualified Bank Concluded
CMP250 CMP250: Stabilising BSUoS with at least a 12 month notice period Concluded
CMP266 CMP266: Removal of Demand TNUoS charging as a barrier to future elective Half Hourly settlement Concluded

More about modifications

Modification Tracker

Our Tracker gives you the latest details on current code modifications including the purpose and the stakeholders it affects, as well as panel comments and where it is in the review process. It is published on the 7th (or next working day) of each month.

Modification Proposal Form

If you're thinking about raising a modification, please get in touch with us. Our experts can give you advice on your Proposal, explain how the modification process works and help to answer any questions you may have. When we receive your Proposal, we'll check it through and work together to make sure it's easy to understand.

Calendar

Once you've been in touch and are ready to write your Proposal paper, send it to us by the monthly modification submission date which you can find on our Calendar.