# Commission Regulation (EU) 2017/1485 of 2 August 2017 establishing a guideline on electricity transmission system operation (Text with EEA relevance), Article 128: FRCE target parameters

Extent: E+W+S+N.I.

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4. Where an LFC block consists of more than one LFC area, all TSOs of the LFC block shall specify in the LFC block operational agreement the values of the FRCE target parameters for each LFC area.
5. For the GB synchronous area the Level 1 FRCE range shall be equal to or larger than 200 mHz and the Level 2 FRCE range shall be equal to or larger than 500 mHz.
6. All TSOs of the GB synchronous area shall endeavour to comply with the following FRCE target parameters of a synchronous area:
(a) the maximum number of time intervals outside the Level 1 FRCE range shall be less than or equal to the value in the Table of Annex IV as a percentage of the time intervals per year;
(b) the maximum number of time intervals outside the Level 2 FRCE range shall be less than or equal to the value in the Table of Annex IV as a percentage of the time intervals per year.
7. All TSOs shall verify, at least annually, that the FRCE target parameters are fulfilled.

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Source: https://www.legislation.gov.uk/eur/2017/1485/article/128 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1485/article-128
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.