To fill any vacancy occasioned by the failure of any person appointed as a member or as an alternate member of the Board to qualify, or in the event of the death, removal, resignation, or disqualification of any member or alternate member of the Board, a successor for the unexpired term of such member or alternate member of the Board shall be appointed by the Secretary from the most recent list of nominations for the Board made by growers and handlers, from nominations made by the Board, or from other qualified individuals. Any nominations made by the Board to fill a vacancy must be received by the Secretary within 90 days of the effective date of the vacancy. Board members wishing to resign from the Board must do so in writing to the Secretary.