The main objective of the project is to create a legislative and strategic basis for the preparation of future legislation implementing the European Commission's new instrument to promote energy efficiency across sectors (Article 3 of Directive 2012/27/EU of the European Parliament and of the Council of 25 October 2012 on energy efficiency ("Directive") and the European Commission Recommendation 2021/1749 on its application ("Recommendation")) and to prepare strategic policy documents; analysis of a suitable model of implementation of the "energy efficiency first" ("EE1") principle in Czech legislative framework; definition of range of activities on which EE1 should be applied; elaboration of proposals for legislative amendments; development of a model EE1 cost-benefit analysis ("CBA").