2.

The results of the operational testing referred to in paragraph 1 shall be used by a TSO, DSO or a SGU, in order for: the TSO to ensure correct functioning of transmission system elements; the DSO and SGUs to ensure correct functioning of distribution systems and of the SGUs' facilities; the TSO, DSO or SGU to maintain existing and develop new operational practices; the TSO to ensure fulfilment of ancillary services; the TSO, DSO or SGU to acquire information about performance of transmission system elements and facilities of the SGUs and DSOs under any conditions and in compliance with all relevant operational provisions of this Regulation, in terms of: controlled application of frequency or voltage variations aimed at gathering information on transmission system and elements' behaviour; and tests of operational practices in emergency state and restoration state.

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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.