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.

Views reference
Modification status
ID Name Status Last Updated
CMP371 CMP371: Assessing CUSC Modification Proposals against charging and standard objectives' Concluded
CMP370 CMP370: Revision of the connection offer acceptance period for interactive connection offers Concluded
CMP373 CMP373 'Deferral of BSUoS billing error adjustment' Concluded
CMP368 & CMP369 CMP368 & CMP369: 'Updating Charges for the Physical Assets Required for Connection, Generation Output and Generator charges for the purpose of maintaining compliance with the Limiting Regulation & 'Consequential changes to Section 14 of the CUSC' Concluded
CMP367 CMP367 'Urgent housekeeping modification as a result of 1 April implementations' Concluded
CMP366 CMP366: Housekeeping Modification as a result of CMP346 and CMP324/CMP325 implementation Concluded
CMP365 CMP365 'Improvements to CUSC Governance Arrangements' Concluded
CMP363 & CMP364 CMP363 & CMP364: TNUoS Demand Residual charges for transmission connected sites with a mix of Final and non-Final Demand & Definition changes for CMP363 Concluded
CMP361 & CMP362 CMP361 & CMP362: 'BSUoS Reform: Introduction of an ex ante fixed BSUoS tariff & Consequential Definition Updates' Concluded
CMP360 CMP360 'Aligning Section 14 of the CUSC ‘Balancing Services Use of System Charging Methodology’ to the licence changes introduced by RIIO-2 in respect of the ‘System Operator Revenue Restriction’ 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.