(2) Any designation by the parties of the law or legal system of a given country or political subdivision thereof shall be construed, unless otherwise expressed, as directly referring to the substantive law of that state and not to its conflict of laws rules.
(3) Failing any designation of the law under subsection (1) of this section by the parties, the arbitral tribunal shall apply the rules of law it considers to be appropriate given all the circumstances surrounding the dispute.
(4) The arbitral tribunal shall decide ex aequo et bono or as amiable compositeur if the parties have expressly authorized it to do so.
(5) In all cases, the arbitral tribunal shall decide in accordance with the terms of the contract and shall take into account the usages of the trade applicable to the transaction. [1991 c.405 §31]