The Pennsylvania Supreme Court has held that a local court rule preventing a witness who had not testified at an arbitration hearing from testifying in a subsequent trial on appeal contravened the express mandate of the Arbitration Act that all appeals should be de novo and thus exceeded the rulemaking authority of the common pleas courts.
Weber v. Lynch, 375 A.2d 1278 (Pa. 1977).
Ronald L. Slater,
Arbitration - Compulsory Arbitration in Pennsylvania - Arbitration Act - De Novo Appeals,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol16/iss3/11