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

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. Or filter according to status.

Views reference
Modification status
ID Name Status Last Updated Sort ascending
GC0110 GC0110: LFSM-O compliance requirements for Type As and B PGMs Implemented
GC0142 GC0142: Adding Non-Standard Voltages to the Grid Code Implemented
GC0172 GC0172: Replacing References to Electricity Supply Industry Arbitration Association Current
GC0132 GC0132: Updating the Grid Code governance process to ensure we capture EBGL change process for Article 18 Terms and Conditions (T&Cs) Implemented
GC0129 GC0129 - Updating the Grid Code to use Engineering Recommendation G5/5 - Harmonics Implemented
GC0105 GC0105: System Incidents Reporting Implemented
GC0096 GC0096: Energy Storage Implemented
GC0135 GC0135 - Removal of Redundant Provisions Implemented
GC0128 GC0128 EU Code Emergency & Restoration: Requirements resulting from System Restoration Plan Implemented
GC0127 GC0127 EU Code Emergency & Restoration: Requirements resulting from System Defence Plan Implemented

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.