(1) County lists will obtain mandate in proportion to ballots cast, based on the form of calculation set out in Section 17 (5).
(2) No mandate will be given to
a) the county list of the nominating organisation if it has not reached five per cent of the valid votes cast on county lists, or
b) the joint county list if it has not reached ten per cent of the valid votes cast on county lists, or fifteen per cent thereof in the case of joint county list set up by more than two nominating organisations. In this respect, solely valid votes cast on joint county lists compiled by the same nominating organisations may be aggregated.
(3) If the list is given more mandates than the number of persons in the list, the mandate will remain unfilled.