GC0174 Grid Code (GC) changes
- Publication type:
- Code modification
- Publication date:
- Topic:
- Energy codes, National Energy System Operator (NESO), Electricity transmission
- Subtopic:
- Grid code
- Industry sector:
- Transmission Network
Outcome of changes to Grid Code: Modification GC0174 Review of obligations to provide EU Transparency Availability Data as specified in OC2.4.7.
Details of outcome
The Authority has decided to approve Grid Code modification GC0174. This modification removes potential duplication, aligns references with Assimilated Law, clarifies compliance requirements. The decision was supported unanimously by the Workgroup and the Grid Code Review Panel, who agreed the modification promotes efficiency and consistency across codes.
Start date
12 December 2025 (10 working days after decision)
Code modification description
The modification proposal GC0174 was raised by NESO, with the proposal being submitted on 11 June 2024.
The driver for change is to remove duplication and simplify processes by allowing Users to meet EU Transparency Availability Data obligations through either REMIT or MODIS, rather than requiring separate submissions. This also updates references to reflect Assimilated Law and current operational platforms.