Article 27 1.

Member States shall ensure that independent control systems for energy performance certificates are established in accordance with Annex VI, and that independent control systems for renovation passports, smart readiness indicators and reports on the inspection of heating systems, ventilation systems and air-conditioning systems are established. Member States may establish separate systems for the control of energy performance certificates, renovation passports, smart readiness indicators and reports on the inspection of heating systems, ventilation systems and air-conditioning systems.