Grounds for setting aside award - Section 30An award shall not be set aside except on one or more of the following grounds, namely:
(a) that an arbitrator or umpire has misconducted himself or the proceedings;
(b) that an award has been made after the issue of an order by the Court superseding the arbitration or after arbitration proceedings have become invalid under Sec. 35;
(c) that an award has been improperly procured or is otherwise invalid.