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System Operator – Transmission Owner Code

The System Operator -Transmission Owner Code (STC) was activated on the Betta Go-Active Date (1 September 2004) and defines the high-level relationship between the GB System Operator and the Transmission Owners.

It is supported by a number of procedures (STCPs) that set out in greater detail the roles, responsibilities, obligations and rights etc of the GBSO and the TOs.

Documentation explaining how to become a party to the STC is available below.  The steps required are explained in 'How to apply to the STC' and the Application Form required to initiate accession to the STC is contained within this.

This link will take you to our Code Summaries page which includes a summary of the STC