Who may pursue the activities of private entrepreneurs?

The following may pursue the activities of private entrepreneurs:

a)   Hungarian nationals,
b)  nationals of any member state of the European Union or any state that is a party to the Agreement on the European Economic Area, and persons enjoying the same treatment as nationals of States who are parties to the Agreement on the European Economic Area by virtue of an agreement between the European Community and its Member States and a State that is not a party to the Agreement on the European Economic Area with respect to establishment;   
c)  persons - other than those mentioned in Paragraph b) - exercising the right of free movement and residence in the territory of the Republic of Hungary in accordance with the Act  on the Admission and Residence of Persons with the right of Free Movement and Residence;
d)  persons who have been granted immigrant or permanent resident status under the Act on the Admission and Residence of Third-Country Nationals, persons holding a residence permit for the purpose of gainful employment, family reunification or for the pursuit of studies, as well as exiles and stateless persons holding a residence permit granted on humanitarian grounds.