37 Pa. Code § 171.100 – Hearing in absence of a party.

(a) The arbitration hearing may proceed in the absence of any party who, after due notice, fails to be present or fails to obtain a continuance.
(b) The arbitration panel may dismiss the action upon failure of the plaintiff to submit evidence and proof required for the making of an award.
(c) An award shall not be made solely on the default of a defendant. The arbitration panel members shall require the plaintiff to submit the evidence and proof as they may require for the making of an award.