The introduction of the offshore transmission regime meant amendments had to be made to the System Operator Transmission Owner Code (STC) and it’s associated Procedures (STCPs) to allow for the inclusion of the new category of Offshore Transmission Owner and the redefinition of the ‘GB Transmission System’ to the ‘National Electricity Transmission System’.

Amendments to the STC and STCPs (apart from STCP19-3, STCP20-1 and STCP22-1) are now complete and can be downloaded using the links below.

To access the remaining documents that form the STC please visit Codes > STC.