From a logical point of view the first proposition upon which the company rests its case is that the Trust in effect holds a monopoly of the supply of electrical energy in Adelaide and is therefore bound to furnish it to those who properly demand a supply, that is of course subject to all lawful excuses, justifications and exceptions. The statutes do not confer a monopoly in terms upon the Trust and indeed quite consistently with the statutory terms anybody might supply electrical energy, but it is quite apparent that in point of fact there can only be one undertaker and that, without parliamentary authority which no one would be expected to seek or to obtain, the Trust is the sole public supplier of electrical energy in Adelaide or the relevant part of Adelaide. Beginning with this fact, the company claims that a principle of law exists that when a public utility or other body or person exercises an exclusive franchise, the body or person is under a duty to provide the service or give the supply covered by the franchise. For this supposed principle counsel for the company had some difficulty in finding authority in English law. Resort was had to the law relating to ancient exclusive franchises and, in particular, rights of ferry whether by grant or prescription. The duties in the case of ferriage are explained as follows in Simpson v. Attorney-General [1] by Lord Macnaghten: "All ancient ferries have their origin in Royal grant or in prescription, which presumes a Royal grant. A right of ferry is in derogation of common right, for by common right any person entitled to cross a river in a boat is entitled to carry passengers too. Within the limits of an ancient ferry no one is permitted to convey passengers across but the owner of the ferry. No one may disturb the ferry. The ferry carries with it an exclusive right or monopoly. In consideration of that monopoly the owner of the ferry is bound to have his ferry always ready". [2] . It is impossible to reason from such analogies to the effect of a modern statutory authority granted to a public utility supplying electrical power and energy. But counsel for the Trust turned to American precedents, the effect of which may be summarized by the following quotation which he made from American Jurisprudence vol. 43, p. 584: "In every grant of a public utility franchise there is implied an agreement on the part of the grantee that it will be exercised and that all duties and conditions prescribed in or inferred from the grant will be performed and discharged." The source of this doctrine in America, which depends upon implication, is suggested by the authorities which deal with the parallel doctrine that the 14th Amendment was consistent with some regulation of businesses "affected by or clothed with a public interest". For example, when the doctrine was in full operation, Taft C.J., in classifying such cases, gave the first two classes as follows: "(1) Those which are carried on under the authority of a public grant of privileges which either expressly or impliedly imposes the affirmative duty of rendering a public service demanded by any member of the public. Such are the railroads, other common carriers and public utilities. (2) Certain occupations, regarded as exceptional, the public interest attaching to which, recognized from earliest times, has survived the period of arbitrary laws by Parliament or colonial legislatures for regulating all trades and callings. Such are those of the keepers of inns, cabs, and gristmills": Chas. Wolff Packing Co. v. Kansas Court of Industrial Relations [1] . In Munn v. Illinois [2] where the doctrine was first established, Waite C.J. took the phrase "affected by a public interest" from Lord Hale's De Portibus Maris in Hargraves' Law Tracts and proceeded through the English authorities such as Allnutt v. Inglis [3] which will be found in the judgment of Stirling L.J. in Simpson's Case [4] , that was reversed in the House of Lords: cf. United Fuel Gas Co. v. Railroad Commission of Kentucky [5] . The American doctrine, which is a deduction from what is implied in the grant of an exclusive right to a public utility, has not been established in English law and certainly has no place in the application of a statutory authority granted by the South Australian enactments which govern this case. Under those enactments the Trust has regarded itself as free to formulate a standard form of contract or standard conditions for those who were prepared to contract for a supply of electrical power and energy. Presumably there are many consumers who, without entering into any contract, are supplied from month to month or as the case may be. But the standard conditions of contract or agreement have been published in the Gazette and it is into a form of contract accepting those conditions that the Trust insists the company must enter, that is to say in the absence of any special provisions upon which the parties are able to agree. For the purposes of deciding this appeal it is enough to set out the clause in dispute. It is cl. 2 and reads as follows: "When, in the opinion of the Trust, the supply of electric energy can most conveniently be effected by placing transformers and/or other equipment on the premises of the consumer, the consumer shall provide free of cost to the Trust, suitable accommodation for such equipment, in a position satisfactory to the Trust, in such manner as to allow free access to the equipment at any time by the Trust's representative(s). The Trust reserves the right to supply other consumers from the said equipment. Any such equipment erected by the Trust shall be under its sole control, and shall remain its property, and shall be removed by it on the termination of the agreement for the supply of electric energy to the consumer." An objection taken to this clause is that, considered apart from s. 15 and s. 16, it is ultra vires of the Trust. Apart from those provisions the power of the Trust to impose conditions in supplying electrical power and energy cannot be denied in view of what has already been said; and there appears to be no tenable ground upon which this objection can be supported. It is therefore necessary to turn to ss. 15 and 16. Section 15 confers a power to contract with a local authority, person or company for the supply of electricity and for providing descriptions of electrical equipment enumerated in detail and for the supply of motive power. The supply may be in such manner and upon such terms as shall be agreed upon between the company and the said local authority, person, or other company: provided that the company, in making any agreement for a supply of electricity, shall not show any undue preference to any local authority, person, or other company. The "terms" referred to appear to cover not only the tariff but all conditions of supply. That too is the meaning of the word in s. 16 which is as follows: "Where a supply of electricity is provided in any part of an area (or part of a town) for private purposes, every company or person within that part of an area (part of a town) shall, on application, be entitled to a supply of electricity on the same terms on which any other company or person in such part of an area (part of a town) is entitled under similar circumstances to a corresponding supply." The strength of the company's case is no doubt to be found in these provisions. Indeed it is not going too far to say that, when stripped of accessories which perhaps have intruded because of the evident competition between the parties to justify the respective stands they take, by a claim of merit, there is little else in the case but the effect of s. 16. It is difficult to see that s. 15 adds anything, for there seems to be a full enough power to contract and the proviso has not yet been violated. It is said that because cl. 2 of the Conditions leaves a discretion to the Trust to require the instalment of a transformer it purports to enable the Trust to prefer one company by abstaining from making such a requirement in that company's case. The answer is that the clause gives a discretion which must be controlled by the obligation not to give an undue preference, and if this be a purported preference by the Trust it may be dealt with under s. 15. That perhaps would mean the intervention of the Attorney-General or the grant of his fiat. The real point in the case is whether s. 16 is violated by cl. 2 and perhaps whether cl. 2 purports to authorize a violation of s. 16. Much may be said upon some aspects of this question. But, as it seems on a fair and literal reading of s. 16, there must be two limbs or ends of the comparison which is to be instituted under s. 16. You must begin with "terms on which (some) other company or person in such part of an area is entitled under similar circumstances to a corresponding supply". When you have found that company or person you may turn to the company or person seeking a supply and say to him or it "You are entitled to a supply on the same terms". The conditions, however, that have been gazetted have been offered to all concerned: indeed they have been accepted by proprietors of a number of large and important buildings, and there is no one in similar circumstances who is "entitled" to a supply on terms which exclude the obligation to provide space for a transformer. The first limb of the comparison therefore appears to be wanting. True it is that cl. 2 allows the Trust a discretion not to require the provision by the party agreeing to it of space for a transformer, but it cannot be said that a person or company who has agreed to the condition but has not been so required is "entitled to a supply" on different terms. One simple though additional answer is that the proofs do not show that there is any company or person receiving under similar circumstances a corresponding supply who is in that situation. Accordingly the plaintiff company's case fails and the appeal should be dismissed.