Section 19(4) of Arbitration & conciliation act 1996 said " The power of arbitral tribunal under sub section(3) includes the power to determine the admissibility, relevance, materiality & weight of any evidence."
My Question is, What are the basis & procedures of laws on which The arbitral tribunal depend ,while deciding on admissibility of evidences?
Is Arbitral tribunal has independent power to decide on section 19(4) of arbitration & conciliation act 1996 , Is there is no law to follow ,while deciding on Admissibility of evidences?