(1) Each party shall have the burden of proving the facts relied on to support its claim or defense.
(2) Witnesses, including expert witnesses, who are presented by the parties to testify on any issue of fact or expertise may be any individual, notwithstanding that the individual is a party to the arbitration or in any way related to a party. Unless otherwise directed by the arbitral tribunal, statements by witnesses, including expert witnesses, shall be in writing and signed by them.
(3) At any time before the close of hearings, the arbitral tribunal may require the parties to produce oral or written testimony, documents, or other evidence and to allow the inspection and reproduction of such evidence, upon suchterms as it shall determine.
(4) The arbitral tribunal shall have the power to determine the admissibility, relevance, materiality and weight of a party’s evidence.