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
Modification status
ID Name Status Last Updated Sort ascending
CM069 CM069: National Grid Legal Separation - consequential changes to incorporate NGESO in STC Sections & Schedules Concluded
PM0115 Amendments to STCP13-1 ‘Invoicing and Payment’ Clause 3.2 - Changes to TO Site Specific Charges Concluded
PM0125 PM0125 - STCP01-1 Amendment to Allow Electronic Switching Instruction Concluded
PM0129 PM0129: Compliance Processes and Modelling amendments following 9th August 2019 Power Disruption Current
CM054 CM054: Code Governance Review - Fast Track Self Governance and Objections Concluded
PM078 PM078: Modification of STCP01-1Appendix D to provide a trigger phrase for controlling the power flow on a HV DC transmission line Concluded
PM095 PM095: STCP 18-3: Process Improvement Concluded
PM0104 PM0104: National Grid Legal Separation - consequential changes to STCP09-1 to reference NGESO Concluded
PM0116 Amendments to STCP18-1’Connection and Modification Application to incorporate Interactivity process Concluded
PM0120 PM0120: Connections Triggering Distribution Impact Assessment 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.