Vacancies for service area boards requiring elected boards shall be filled by the
candidate receiving the highest number of the votes cast for that seat. In the event
that no candidate files for election to a seat which is to be filled at said election,
then no election shall be conducted for that particular seat, and the seat shall be
filled by appointment by the mayor and confirmed by the assembly following certification
of the election and in accordance with applicable provisions of title 16 governing filling vacancies.