public safety and the defence of the Commonwealth for prescribing all matters which
are necessary or con- venient to be prescribed for the more effectual prosecution of any war in which His Majesty is or may be engaged."
Reg. 59 of the National Security (General) Regulations, made under the above-mentioned section, provides, SO far as material, as follows:
(1) A Minister, SO far as appears to him to be necessary in the interests of the defence of the Commonwealth or the efficient prosecu- tion of the war, or for maintaining supplies and services essential to the life of the community, may by order provide-(a) for regulating, restricting or prohibiting the production, distribution, sale, purchase
of essential articles." Essen- tial articles" is defined in sub-reg. 5 as meaning articles appearing to a Minister to be essential for the defence of the Commonwealth or the efficient prosecution of the war, or to be essential to the life of the community."
The Bread Industry (New South Wales) Order, made on 22nd June 1942, in pursuance of reg. 59 of the National Security (General) Regulations by the Minister of State for War Organization of Industry, provides, inter alia, by clause 4, that 'master baker' means any person who manufactures or carries on any process of manufacture of bread for sale" by clause 6 (7), that no person shall carry on the business of a master baker or bread distributor under the authority of a licence"; by clause 9, that a person shall not distribute, or cause to be distributed any bread in any area to which this Order applies unless he is the holder of a current licence authorizing him to distribute bread
or is employed by the holder of such a licence to distribute bread " and by clause 14, that a person shall not carry on the business of a master baker or bread distributor in contravention of this Order
Upon an information laid by John Joseph Coleman, an officer of the Department of War Organization of Industry, Myrtle Grove Stenhouse was charged at a Court of Petty Sessions, Sydney, that on or about 20th July 1944, at Chatswood, New South Wales, she did contravene the provisions of the Bread Industry (New South Wales) Order referred to above, in that she did carry on the business of a master baker without the authority of a licence issued under that Order.
The defendant was convicted. She obtained from the Supreme Court a rule nisi calling upon the informant and the magistrate to show cause why a writ of prohibition should not issue to each of them restraining them and each of them from further proceeding upon or in respect of the