Grid Code Modifications
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.
| ID | Name | Status | Last Updated Sort ascending | |
|---|---|---|---|---|
| GC0164 | GC0164: Simplification of Operating Code No.2 | Current | ||
| GC0154 | GC0154: Incorporation of interconnector ramping requirements into the Grid Code as per SOGL Article 119 | Implemented | ||
| Establishing ISOP in industry codes 2024 | Establishing ISOP in industry codes 2024 | Current | ||
| GC0171 | GC0171: Improving the clarity and transparency of the Compliance Process for Small Generators with a Bilateral Embedded Generator Agreement (BEGA) | Implemented | ||
| GC0145 | GC0145: Updating the Grid Code to include the Manually Activated Reserve Initiative (MARI) | Withdrawn | ||
| GC0121 | GC0121 - Grid Code changes in the event the UK leaves the EU without an agreement | Withdrawn | ||
| GC0133 | GC0133: Timely informing of the GB NETS System State condition | Withdrawn | ||
| GC0146 | GC0146: Solutions for frequency control of Power Park Modules | Withdrawn | ||
| GC0126 | GC0126: Implementing Profiled Stable Import and Export Limits, and reversing unimplemented aspects of GC0068 | Withdrawn | ||
| GC0162 | GC0162: Changes to OC6 to amend the operational timings for the delivery of the additional demand reduction above 20%, with a focus between 20% and 40% | 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.