The appellant Victor Eric Potter has been in the service of the tramways board for many years and since 1940 has acted as a one-man-bus operator. Owing to a somewhat lengthy record of failing to keep to the timetable of his route his case was at length considered by the traffic manager of the tramways board who decided to move the appellant from the employment of a one-man-bus operator to that of a conductor. This involved a reduction in grade and a reduction in his pay by £2 2s. 6d. a week. The appellant thereupon lodged a notice of appeal against the decision to the appeal board. The appeal board is constituted by sub-s. (5) of s. 17 of the Melbourne and Metropolitan Tramways Act 1928 as amended by s. 2 of Act No. 3902 and s. 2 of Act No. 5206. Sub-section (1) of s. 17 confers general powers upon the board which include that of appointing officers, servants and persons, such officers, servants and persons to assist in the execution of the Act as it thinks necessary and removing any officer, servant or person appointed or employed by it under the Act. Sub-section (5) provides that there shall be an appeal board consisting of three persons. One of the persons is to be appointed by the board, another by the officers, servants and employees of the board and the third by the Governor in Council. Sub-paragraph (b) (i) of sub-s. (5) is in its present form to be found in Act No. 3902. It contains the statement of the duty of the appeal board. The board is to hear and determine all appeals by officers, servants and employees of the Melbourne and Metropolitan Tramways Board against dismissals, fines, deductions from wages, reductions in rank, grade or pay or other punishments inflicted by the last-mentioned board (other than suspension for only one day or the loss of only one day's pay or the deprivation of only two days' good-conduct holidays as to any of which punishments there shall be no appeal) and in its determination the appeal board may confirm quash or vary (whether by increasing or decreasing any such punishment or otherwise as it thinks fit) any decision by such last-mentioned board in respect of which such an appeal is made. By sub-par. (b) (ii), which in its present form is to be found in Act No. 5206, the appeal board is to hear and determine also all appeals by such officers, servants and employees who are aggrieved by not being selected for promotion or by the promotion of another or by promotions being unreasonably withheld, and in its determination the appeal board may refuse or allow any such appeal. The appeal board is given authority to administer an oath to any witness, the hearing of an appeal is to be open to the press unless the board unanimously otherwise determines; and on any such appeal a full record is to be taken of all the evidence submitted thereat. The determination of the appeal board in every case is to be reported to the Minister and is to be binding on the Melbourne and Metropolitan Tramways Board and every appellant, and is immediately to be given effect to by the latter board and may be enforced in any court of competent jurisdiction.