Earlier awards made in 1918, 1927, 1941 and 1950 respectively have contained not dissimilar provisions relating to the number of cooks to be carried on vessels with crews exceeding a specified number or specified numbers. Now, following the commissioning of the M.T. Cellana - a vessel carrying a crew of thirty-eight - an application to vary the current award has been made by the respondent organization. The variation sought is as follows: "Clause 22 (a). Notwithstanding Clause 22 the manning of the vessel M.T. Cellana shall be one chief cook, one second cook, and one assistant cook." The ground of the application is that the size of the galley provided on the vessel and the type of equipment provided will involve the galley staff in sufficient work to justify the assistance which would be provided by a third cook. Whether this is so or not is not a matter for this Court; what is before us is an order nisi for prohibition addressed to the respondents requiring them to refrain from proceeding with the hearing of the application and raising two questions for our decision. The first is, in effect, whether a dispute as to the number of cooks to be carried on specified vessels, or vessels of specified description, is a dispute as to an industrial matter. Such a matter, it is asserted, does not pertain to the relations of employers and employees but is one exclusively within the province of management. Secondly, it is said that in view of the provisions of Div. 7 of Pt II of the Navigation Act 1912-1967 Cth the definition of industrial matters, contained in Div. 2 of Pt III of the Conciliation and Arbitration Act 1904-1967 Cth, should be construed so as not to include a matter such as that under consideration or that Div. 7 makes exhaustive and exclusive provision in respect of, inter alia, that matter.