Within the centralised management of tenders, which covers of the total value of procurement within the 2020 scope of consolidation, amounting to around 3,000 orders/contracts managed, as a requirement for participation, for 100% of tenders for the award of works contracts and for numerous contracts for the purchase of goods and services, Acea requires UNI EN ISO 9001 quality management system and the UNI ISO 45001:2018 occupational health and safety certifications.