In some cases, the specific requirements include holding certain Authorisations and/or certifications, for example: · possession of UNI EN ISO quirement for all the “works” product groups and for almost all the “goods and services” qualification systems); · possession of UNI EN ISO 14001 certification (for example for registration in the Qualification System for special non-hazardous waste); · possession of Registration to the National Environmental Operators’ Register or authorisation to manage a plant for the recovery/disposal of waste (for example for registration in Waste Management Systems); · possession of OHSAS 18001 certification (for example for registration in the Qualification system for the electro-mechanical maintenance of industrial plants).