(b) No person shall be eligible for appointment as a director of probation or deputy director of probation pursuant to subdivision one of this section who does not meet the minimum qualification requirements established for the position by the general rules regulating methods and procedures in the administration of probation.
(c) The provisions of this subdivision shall not apply to any person holding the office of director or deputy director of probation in any such county on the effective date of this subdivision during the term of such office.