For proper relations between Acea, as a contracting authority, and its suppliers: Contractors and subcontractors observe in particular the rules and procedures, including processes of due diligence aimed at assessing any risks of corruption, the principles of transparency and protection of competition, the principles of good faith, loyalty, professional propriety and the promotion of sustainability, like respect for the protection and safety of workers, the quality of goods, services and performance, respect for the environment and the pursuit of energy savings.