Where, before or on the hearing of a suit or an appeal in which the decree is not subject to appeal, or where, in the execution of any such decree, any question of law or usage having the force of law arises, on which the Court trying the suit or appeal, or executing the decree, entertains reasonable doubt, the Court may, either of its own motion or on the application of any of the parties, draw up a statement of the facts of the case and the point on which doubt is entertained, and refer such statement with its own opinion on the point for the decision of the High Court.