STC Modifications

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

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.

Modification status
ID Name Status Last Updated Sort ascending
PM084 PM084: Improvements to Revenue Forecast Information Provision under STCP24-1 Concluded
PM0101 PM0101: STCP09-1 'Update of procedure on ‘Safety Co-ordination between Parties’ covering HV proximity safety management and testing' Concluded
PM0119 PM0119: TNUoS Revenue Collection Risk Transfer Concluded
CM061 CM061: This proposal seeks to modify the System Operator Transmission Owner Code (STC) to align the elections process to those in the SQSS to allow for an 'Alternative OFTO Election Process' and extend the term of office from one year to two years Concluded
PM085 PM085: Modification to STCP04-3 to include a Power Available signal in Appendix B4.1 Concluded
CM070 CM070: Consequential STC Updates following implementation of RfG and HVDC into the GB Grid Code Concluded
CM062 CM062: This proposal seeks to implement the license changes to the STC arising from Ofgem's Code Governance Review (Phase 3) Concluded
PM086 PM086: Difficulties in meeting the current year ahead data submission timelines in STCP11-1 Concluded
CM064 CM064: Update to the STC Schedule 4,Boundaries of Influence Concluded
PM0109 PM0109: STCP27-01 Legal Separation Amendments 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.

STCP Modification Proposal Form

Download the STCP Proposal form, when we receive your Proposal, we'll check it through and work together to make sure it's easy to understand.

STC Modification Proposal Form

Download the STC Proposal form, 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.