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Foráiltear do bhunphrionsabal na héifeachtúlachta fuinnimh i Rialachán (AE) 2018/1999 ó Pharlaimint na hEorpa agus ón gComhairle agus is dlúthchuid de Straitéis an Aontais Eorpaigh um Chomhtháthú Córas Fuinnimh é, a bunaíodh sa teachtaireacht ón gCoimisiún an 8 Iúil 2022.
The energy efficiency first principle is provided for in Regulation (EU) 2018/1999 of the European Parliament and of the Council and is at the core of the EU Strategy for Energy System Integration established in the Commission’s communication of 8 July 2022.