Rule 1305 - Conduct Of Hearing. Evidence(a) At the hearing, the arbitrators shall have the power to rule on the questions of evidence, to determine the number of witnesses who shall be heard and the extent to which they will be examined and cross-examined, to decide both the law and the facts of the case, and generally to control the proceedings in such a way that the case will be disposed of promptly.(b) Witnesses before the arbitrators shall be sworn or affirmed by them, and witness fees and mileage shall be allowed and taxed at the legal rate for a court of record. The successful party may file his witness bill with the prothonotary.Amended effective 7/1/2005.