# Commission Regulation (EU) 2017/1485 of 2 August 2017 establishing a guideline on electricity transmission system operation (Text with EEA relevance), Article 134: LFC block monitor

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

1. All TSOs of a LFC block shall appoint one TSO of that LFC block in the LFC block operational agreement as LFC block monitor.
2. The LFC block monitor shall collect the frequency quality evaluation data for the LFC block in accordance with the criteria application process referred to in Article 129.
3. Each TSO of a LFC area shall provide the LFC block monitor with the LFC area measurements necessary for collecting frequency quality evaluation data for the LFC block.
4. The LFC block monitor shall deliver the frequency quality evaluation data of the LFC block and its LFC areas once every 3 months and within 2 months after the end of the analysed period.

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Source: https://www.legislation.gov.uk/eur/2017/1485/article/134 (the official version)
Page: https://openlegislation.uk/eu-regulation-2017-1485/article-134
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.