Can you, while driving a four-wheeled vehicle (microcar, quad), transport a child aged up to 6?

Yes, regulations permit transporting a child on a quad bike under certain conditions. According to Art. 20 para. 6 pt. 3 of the Road Traffic Act, the speed of a quad bike carrying a child up to the age of 7 is limited to 40 km/h. This means that transporting a child up to the age of 6 is legal, provided this speed limit is observed.