STC Code Documents

All documents relating to the STC are available here to download. Including the latest version of the code itself, in full, and details of any revisions.

For more information about the code, please contact STCTeam@nationalenergyso.com 

STC Documents

Name Published
Complete STC - 03 April 2025 3 Apr 2025
Schedule 15 – Transmission Interface Agreement v4 3 Apr 2025
Section J Interpretation and Definitions v28 3 Apr 2025
Section H - Dispute Resolution v12 3 Apr 2025
Section F - Communications and Data v7 3 Apr 2025
STC Index of Revisions v24 03 April 2025 28 Mar 2025
Schedule A - List of Parties 14 Mar 2025
Section K - Technical Design and Operational Criteria and Performance Requirement for Offshore Transmission Systems 15 Nov 2024
Section D - Planning Co-ordination v15 30 Aug 2024
Section G - General Provisions v10 30 Aug 2024

STC Procedures

Name Published
STCP06-4 Contingency Arrangements Issue 009 12 Mar 2025
STCP19-3 Operational Notification and Compliance Testing Issue 14 13 Jun 2024
STCP18-4 - Request for a Statement of Works Issue 007 11 June 2024 11 Jun 2024
STCP04-04 - Provision of Asset Operational Information Issue 006 16 Apr 2024
STCP08-2 - Circuit Live Trip and DAR Tests Issue 008 12 Apr 2024
STCP11-1 Outage Planning Issue 0010 12 April 2024 12 Apr 2024
STCP19-6 - Application Fee Refresh Template Issue 0010 12 Apr 2024
STCP11-2 Outage Data Exchange Issue 0010 12 Apr 2024
STCP18-7 issue 001 Queue Management Co-ordination Procedure 13 Mar 2024
STCP18-01 Connection and Mod Application Issue 0013 04 March 2024 4 Mar 2024