27. (1) Where a licensing authority or other authority refuses to issue or renew, or revokes any conductor's licence, it shall do so by an order communicated to the applicant or the holder of conductor's licence, as the case may be, giving the reasons in writing for such refusal or revocation. (2) Any person aggrieved by an order made under sub section (1) may, within thirty days of the service on him of the order, appeal to the prescribed authority which shall decide the appeal after giving such person and the authority making the order an opportunity of being heard and the decision of the appellate authority shall be binding on the authority making the order.