Section 18. If the Court of first appeal confirms the decision of the Court of first instance, such decision shall be final:

18. If the Court of first appeal confirms the decision of the Court of first instance, such decision shall be final: Reference to Judicial Commissioner. Provided that where, in the trial of any appeal, such appellate Court entertains any doubt in regard to a question of law or usage having the force of law, or as to the construction of a document affecting the merits of the decision, the Court may, either of its own motion or on the application of any of the parties to the case, draw up a statement of the case, and refer it, with the Court's own opinion, for the decision of the Judicial Commissioner. Procedure on such reference.