A person who, in pursuance of section 8 of this Act, is paid a sum which was calculated by reference to a period specified in a direction under subsection (4) of that section, or to whom a vehicle licence is issued for a period specified in a direction under subsection (5) of section 11 of this Act, may appeal to the county court, or in Scotland by way of summary application to the sheriff, on the ground that the Minister was not authorised by that subsection to give the direction.