If any panel member, after having received due notice of his appointment and the date, time and place of the arbitration hearing, fails to attend the hearing and undertake the duties of the appointment or give notice of his necessary absence to the Administrator more than 7 days in advance of the scheduled hearing, unless as a result of illness or other unavoidable cause, the Administrator may require the panel member to pay a sum equal to the costs incurred by the Administrator as a result of his absence.
37 Pa. Code § 171.99