Article 15 4.

Provided that the Commission has adopted the delegated act referred to in paragraph 2, it shall, by 30 June 2027, adopt an implementing act detailing the technical arrangements for the effective implementation of the application of the scheme referred to in paragraph 2 to non-residential buildings with an effective rated output for heating systems, air-conditioning systems, systems for combined space heating and ventilation, or systems for combined air-conditioning and ventilation of over 290 kW.