The Australian Workers' Union objected to the validity of the order and moved for a writ of prohibition as prosecutor but it received the support of the State Wheat Board of Queensland which appeared at the hearing of the order nisi, having been served and afterwards added as a party, and on behalf of which it was contended on many grounds that the order was beyond the power of the learned presidential commissioner. The board is a governmental agency of the State of Queensland established by the Wheat Pool Acts 1920-1930 and continued by Proclamations made under s. 3 of that legislation. The State Board acts in co-operation with the Australian Wheat Board in the arrangements from time to time for dealing with the Australian wheat crop. A shed, No. 1, at Pinkenba belongs to the Commonwealth and is occupied, under lease it is stated, by the State Wheat Board. On the wharf side the entrance to the shed is about fifty feet from the wharf itself. Bagged wheat would be stacked in the shed, awaiting shipment, in normal years when there was an exportable surplus of wheat in Queensland. The stacking has been done by members of the Australian Workers' Union and they have been employed by the State Wheat Board. Apparently in the season of five to six years ago it was necessary to import wheat at Pinkenba. The ships carrying the wheat discharged at the wharf, the slings of bagged wheat were conveyed by gooseneck crane from the ship's side into the shed and stacked. It seems that using such a crane only the height of a stack would be limited to eleven or twelve bags. By the use of elevators however, the stacks were taken even as high as thirty bags. In that season the work was divided between members of the Waterside Workers' Federation and members of the Australian Workers' Union at the point where the bags were taken from the slings. The former loaded the bags upon the elevators at the foot, the latter took them from the elevators at the top and built up the stacks. No dispute arose then between the two classes of workers. It was not until February 1957 that a ship again discharged bagged wheat at Pinkenba. In that month two ships did so. As to the first nothing need be said but difficulties arose over the second. Motor trucks, and not gooseneck cranes, moved the bagged wheat to the place of stacking in the shed. A dispute arose as to whose work it was or where the division should be but it was settled on the footing that the waterside workers took the bags from the trucks and placed them on the elevators and the men of the Australian Workers' Union took the bags from the elevators and stacked them. Another ship carrying bagged wheat arrived at Pinkenba in July. Again difficulties arose but they were adjusted. The adjustment involved a mode of operation which Ashburner J. has characterised as grossly inefficient and when in October 1957 another ship arrived there was a refusal by the stevedore and by those representing the State Wheat Board to follow the method. This led to the calling of a board of reference. After that there was a cessation of work. Ashburner J. as a presidential commissioner intervened in the hope of bringing the parties to an agreement. Eventually, on 21st October 1957, the Waterside Workers' Federation filed an application to the commission for an order that when bagged wheat being discharged from a vessel berthed at Pinkenba is being stacked in No. 1 shed, members of the Waterside Workers' Federation of Australia should be employed to perform the work of stacking the bags in the shed. Grounds in support of the application were stated but they went to the propriety of the order sought rather than to the jurisdiction to make it. Two of the grounds, it is true, end by asserting that the employer concerned, presumably the State Wheat Board, had refused to accede to the claim. This language may be the outcome of a desire to suggest the existence of an industrial dispute, but if so, obviously it was a purely local one. It would seem that the particular powers of the commission under Div. 4 of Pt. III of the Conciliation and Arbitration Act 1904-1956 were in view when the application was made. These powers relate to the stevedoring industry and rest in part upon the legislative power with respect to trade and commerce with other countries and among the States and in part upon the industrial arbitration power. Ashburner J. however, rejected the view that under Pt. III Div. 4 he obtained any power which would enable him to make the order sought by the application. Before he could exercise either of the powers conferred by s. 82 there must be an "industrial matter" and by definition (s. 81 (1)) that required "employers" in the defined sense and "waterside workers" in the defined sense. The definitions of the terms in s. 81 (1) throw you back on the definitions of the Stevedoring Industry Act 1956. The definition of "waterside worker" could not include members of the Australian Workers' Union and these were the persons employed by the State Wheat Board and the definition of "employer" would not reach the State Wheat Board. In this Court the correctness of the view adopted on this point by Ashburner J. has not been impugned. The basis upon which his Honour placed his jurisdiction to make the order complained of was the general power over industrial disputes conferred upon the Commonwealth Conciliation and Arbitration Commission by Div. 1 of Pt. III of the Act. In support of the application for a writ of prohibition the possibility in a matter concerning waterside workers of the commission falling back on Div. 1 of Pt. III was contested. It was said that it is a purpose of Div. 4 of Pt. III and the Stevedoring Industry Act 1954-1956 to state exhaustively the powers and authorities that may be exercised with respect to the work of waterside workers. It was also said that the extent to which members of the Waterside Workers' Federation (together with any other body brought within the definition of union in s. 7 (1) of the Stevedoring Industry Act 1956) are to have exclusive occupation of a field of work is defined or plotted out by the Stevedoring Industry Act 1954-1956 and the commission could not add to it, at all events in the exercise of any power lying outside Div. 4 of Pt. III.