the provisions of the Act the plaintiff doctors will be substantially prevented from and hindered in practising and carrying on their professions and hindered in the proper treatment of their patients by, inter alia, the requiréments of the Act and the regulations relating to the writing of prescriptions, the repeating of prescrip- tions, the quantities of formulary medicaments that may be prescribed, the prescription of formulary medicaments in the form of a particular trade mark, brand, make or proprietary equivalent, and the permitted variations of formulae contained in the Formu- lary." The plaintiffs submitted, in pars. 13 and 14, that the Act, or, alternatively, that SS. 7, 7A, 8, 11, 14, 21 and 23 of the Act was, or were, beyond the powers of the Commonwealth Parliament, contrary to the provisions of the Commonwealth Constitution and was, or were, void; and, in pars. 15 and 16, that the regulations, or, alternatively, that regs. 4, 11, 15-18, 23, 24, 29-31 and 34, were, or each was, not authorized by the Act and were, or was, beyond the powers of the Governor-General and void. " 17. The defend- ants threaten and intend to prevent and hinder the plaintiff doctors from and in practising and carrying on their professions and to hinder them in the proper medicinal treatment of their patients by the enforcement, contrary to law and the provisions of the Consti- tution of the Commonwealth, of all the provisions of the Act and the regulations. 18. The plaintiff doctors desire to carry on and practise their professions and to prescribe the proper medicinal treatment of their patients without complying with the provisions of the Act or of the regulations, but the plaintiffs fear that they will be unable to do SO by reason of the threats and intentions of the defendants as aforesaid, and the plaintiffs fear that by reason of the premises the plaintiff doctors will be substantially prevented from and hindered in practising and carrying on their professions and hindered in the proper medicinal treatment of their patients and that they and their servants and agents will be exposed to a multiplicity of prosecutions."
The plaintiffs claimed against all the defendants:-(i) a declara- tion that the Pharmaceutical Benefits Act 1947-1949, or, each of the said sections, was invalid and void; (ii) a declaration that the regulations were, or, alternatively, that each of the said regulations was invalid and void; and (iii) an injunction restraining them and each of them their servants and agents from preventing and hinder- ing the plaintiff doctors from and in practising and carrying on their profession and from hindering those plaintiffs in the proper medicinal treatment of their patients by taking or causing or