(a)

N – 1 formula the identification of the single largest gas infrastructure; the calculation of the N – 1 formula at national level; a description of the values used for all elements in the N – 1 formula, including intermediate values used for their calculation (e.g. for EP_(m) indicate the capacity of all entry points considered under this parameter); an indication of the methodologies used, if any, for the calculation of parameters in the N – 1 formula (e.g. D_(max)) (use annexes for detailed explanations); an explanation of the results of the calculation of the N – 1 formula considering the level of storages at 30 % and 100 % of the maximum working volume; an explanation of the main results of the simulation of the N – 1 formula using a hydraulic model; if so decided by the Member State, a calculation of the N – 1 formula using demand-side measures: calculation of the N – 1 formula in accordance with point 2 of Annex II, description of the values used for all elements in the N – 1 formula, including intermediate figures used for the calculation (if different to the figures described under point 2(a)(iii)), indicate the methodologies used, if any, for the calculation of parameters in the N – 1 formula (e.g. D_(max)) (use annexes for detailed explanations), explain the market-based demand-side measures adopted/to be adopted to compensate a disruption of gas supply and its expected impact (D_(eff)); if so agreed with the competent authorities of the relevant risk group(s) or with directly connected Member States, joint calculation(s) of the N – 1 formula: calculation of the N – 1 formula in accordance with point 5 of Annex II, description of the values used for all elements in the N – 1 formula, including intermediate values used for their calculation (if different to the figures described under point 2(a)(iii)), indicate the methodologies and assumptions used, if any, for the calculation of parameters in the N – 1 formula (e.g. D_(max)) (use annexes for detailed explanations), explain the agreed arrangements to ensure compliance with the N – 1 formula;

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Source: EUR-Lex (Cellar) · retrieved 2026-11-01 · Text as adopted (Official Journal); later amendments are not incorporated in this text.