Any party aggrieved by an adjudicatory action or decision of a Departmental official relating to rights or privileges based upon law in any case or proceeding in which Departmental regulations allow a right of appeal to the head of the Department from such action or decision, should direct his appeal to the Director, Office of Hearings and Appeals, if the case is not one which lies within the appellate review jurisdiction of an established Appeals Board and is not excepted from the review authority delegated to the Director. No appeal will lie when the action of the Departmental official was based solely upon administrative or discretionary authority of such official.