Article 108

Each TSO shall monitor the availability of ancillary services. With regard to active power and reactive power services, and in coordination with other TSOs where appropriate, each TSO shall: design, set up and manage the procurement of ancillary services; monitor, on the basis of data provided pursuant to Title 2 of Part II, whether the level and location of available ancillary services allows ensuring operational security; and use all available economically efficient and feasible means to procure the necessary level of ancillary services. Each TSO shall publish the levels of reserve capacity necessary to maintain operational security. Each TSO shall communicate the available level of active power reserves to other TSOs upon request.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-04 · Text as adopted (Official Journal); later amendments are not incorporated in this text.