This Regulation lays down a detailed guideline on electricity balancing including the establishment of common principles for the procurement and the settlement of frequency containment reserves, frequency restoration reserves and replacement reserves and a common methodology for the activation of frequency restoration reserves and replacement reserves.

This Regulation shall apply to transmission system operators (‘TSOs’), distribution system operators (‘DSOs’) including closed distribution systems, F1the regulatory authority F2..., third parties to whom responsibilities have been delegated or assigned and other market participants.

This Regulation shall apply to all transmission systems and interconnections F3within the jurisdiction of Great Britain except the transmission systems on islands that are not connected with other transmission systems via interconnections.

F4This Regulation shall apply to all TSOs in Great Britain. Where a TSO does not have a function relevant to one or more obligations under this Regulation, F5the Secretary of State or the regulatory authority may provide that the responsibility to comply with those obligations is assigned to one or more specific TSOs.

Where a load-frequency control (‘LFC’) area consists of two or more TSOs, all TSOs of that LFC area may decide, subject to the approval by the relevant regulatory authorities, to exercise one or more obligations under this Regulation in a coordinated manner for all scheduling areas of the LFC area.

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This Regulation shall apply to all system states defined in Article 18 of Regulation (EU) 2017/1485.