- The owner must be a company (from any country), not an individual. The company representative’s identification number is needed as the domain contact.
- Extension reserved for companies dedicated to providing access to Internet services recognized by the CONATEL. These domains will only be registered to the company name, social reason or fictitious name, but not for products or services that are being offered by the registrant.
- Extension reserved for educational institutions: public or private schools for primary education, public or private schools of secondary education recognized by the Ministry of Education and Culture, and universities recognized by the Supreme Council of Universities.