Useful links :
- Ministry for National Economy http://www.ngm.gov.hu
- Government Office of the Capital City Budapest – Metrology and Technical Suprevisory Department http://www.mkeh.gov.hu/
- National Tax and Customs Administration http://www.nav.gov.hu
- Order of Ministry for National Economy 48/2013. (XI. 15.) –http://net.jogtar.hu/jr/gen/hjegy_doc.cgi?docid=A1300048.NGM