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
CAP158 CAP158 - Provision of interim response volume information Concluded
CMP194 CMP194: Housekeeping modifications to Section 11 of the Connection and Use of System Code (CUSC) Concluded
CAP103 CAP103 - Flexibility of Working Group Internal Procedures Concluded
CAP087 CAP087 - Revisions to Request for Urgency Process Concluded
CAP055 CAP055 - Users' Demand Forecasts for TNUoS Charging Concluded
CAP024 CAP024 - Modification of defined term ‘NGC Credit Rating’ Concluded
CMP344 CMP344: Clarification of Transmission Licensee revenue recovery and the treatment of revenue adjustments in the Charging Methodology Current
CMP416 CMP416: Amending the Fixed Price Period from 6 to 12months with two seasonal tariffs Concluded
CMP213 CMP213: Project TransmiT TNUoS Developments Concluded
CMP237 CMP237: Response Energy Payment for Low Fuel Cost Generation 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.