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.

Views reference
ID Name Status Last Updated Sort ascending
CM094 - Amendment to Bi-annual estimate provisions CM094 - Amendment to Bi-annual estimate provisions Current
CM087 CM087: Introducing Connections Process to facilitate Competitively Appointed Transmission Owners Current
CM086 CM086: Introducing Competitively Appointed Transmission Owners & Transmission Service Providers Current
CM085 CM085: To clarify OFTO reactive power requirements at <20% output Current
PM0137 - Queue Management Co-ordination Procedure PM0137 - Queue Management Co-ordination Procedure Current
PM0124 PM0124: Enduring Expansion Constant & Expansion Factor Review Current
CM093 - Extending the principles of the User Commitment Methodology to Final Sums Methodology as a consequence of CUSC Modification – CMP417 CM093 - Extending the principles of the User Commitment Methodology to Final Sums Methodology as a consequence of CUSC Modification – CMP417 Current
CM089 & CM091 CM089 & CM091 Implementation of the Electricity System Restoration Standard & Implementation of Emergency and Restoration Code Phase II Current
CM080 CM080: Transmission Impact Assessment Process Concluded
CM079 CM079: Consideration of STC/STCP changes in relation to CMP330/374 Current

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.