20.—(1) Any difference under any provision of this Order, unless otherwise provided for in this Order, must be referred to and settled in arbitration, by a single arbitrator to be agreed upon by the parties, within 14 days of receipt of the notice of arbitration, or if the parties fail to agree within the time period stipulated, to be appointed on application of either party (after giving written notice to the other) by the Secretary of State.
(2) Any matter for which the consent or approval of the Secretary of State is required under any provision of this Order will not be subject to arbitration.