Codes Homepage

We are administrators for the Connection and Use of System Code (CUSC), the Grid Code (GC), the System Operator – Transmission Owner Code (STC), and the Security & Quality of Supply Standard (SQSS).

That means we’re here to support those in the industry who want to propose changes, debate important issues and drive key outcomes in the code modification processes. So whether you’re new to the process, or experienced in the way it all works, we’ll help you get to the information you need.

Learn more about what we do

Code Panels

Everything you need to know about our four code Panels, including meeting dates and documentation.

Search for a Code Modification

You can find any current or concluded modifications here, using the mod’s name or ID. Selecting your modification from the dropdown list will take you to the modification page.