Mr. Justice Zappala files a dissenting statement in which Mr. Justice Castille joins.
Underscored material is added.
Bracketed material is deleted. Conduct of Hearing. Except as prescribed by this rule, the rules of evidence shall be followed in all hearings before arbitrators. Rulings on objections to evidence or on other issues which arise during the hearing shall be made by a majority of the board. The board of arbitrators may find a bill authentic, necessary and rea-sonable without extrinsic evidence but is not required to do so.