Prior to accepting the appointment, or as soon as information giving rise to a problem of appearance of fairness becomes known, a person serving in an impartial capacity in a dispute resolution proceeding under the jurisdiction of the commission shall disclose to the parties and to the executive director any circumstances likely to create an appearance of bias or which might disqualify him or her from serving in the impartial capacity. Employment of the person or any member of his or her immediate family by any party shall be disqualifying. Each party to the proceeding shall immediately notify the executive director and the appointee or selectee whether it is willing to waive disqualification. If either party declines to waive the disqualification, the appointment shall be vacated.