If the party against whom the award has been made proves that, under the law governing the arbitration procedure, there is a ground, other than the grounds referred to in Article 1 (a) and (c), and Article 2 (b) and (c), entitling him to contest the validity of the award in a Court of Law, the Court may, if it thinks fit, either refuse recognition or enforcement of the award or adjourn the consideration thereof, giving such party a reasonable time within which to have the award annulled by the competent tribunal.