The arbitration of claims can take several different forms in Pennsylvania, but can be generally categorized as either compulsory judicial arbitration. In a petition to compel arbitration, it is the petitioner's burden to prove that a valid agreement to arbitrate exists.The arbitration system in Allegheny County provides for simple and concise pleadings and a trial of the issues enabling the parties to resolve claims. The rules governing arbitration have recently changed in Pennsylvania. The older law, the UAA or Uniform Arbitration Act, was adopted in 1980. The drafters of the RUAA attempted to fill in gaps in the UAA and bring state law into closer alignment with federal law. Demand that the panel put a stop to any improper questioning. Complete a Free Case Evaluation form now. GoSimon. Courts may invalidate an arbitration agreement on the same grounds as any other contract (42 Pa. C.S.A. ง 7303). Pennsylvania contract law, which stands independent of arbitration.