4.
When implementing the measures provided for in this Regulation, the Competent Authority shall establish the roles and responsibilities of the different actors involved in such a way as to ensure that a three-level approach is respected which involves first the relevant natural gas undertakings and industry, then Member States at national or regional level, and then the Union.
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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.