The subject of this contract includes the following activities: - Action 1 - Preparation of audits to establish the technical characteristics related to the requirements of Art. 169, para. 1 (w. 1-5) and para. 2 from SPA and technical passports of buildings. - Activity 2 - Perform an energy efficiency audit and certification under the Energy Efficiency Act for the implementation of energy efficiency measures in the approved multi-family residential buildings.