In the approval process, suppliers are evaluated in relation to registration, health and safety, environmental, legal, fiscal and financial criteria, as well as integrity requirements, such as connection with bribery, corruption, money laundering and terrorism financing. Suppliers must also ensure a safe and healthy working environment, ensure freedom to join a trade union and non-discrimination on the basis of gender, race, social class, nationality, religion, physical or mental disability, sexual orientation or any other diversity condition, as per Nexa policy.