In these two cases we are called upon to consider whether the power of the Postmaster-General, pursuant to s. 108 of the Broadcasting and Television Act 1942-1960, to "impose further conditions" upon the holders of licences for commercial television stations will be validly exercised by the imposition of the conditions specified in the notice of 25th January 1963 given in compliance with sub-s. (2) of that section. There is, of course, a direct relationship between the provisions of s. 108 of the Act and those of s. 81. The latter section authorizes the Minister to grant licences for commercial television stations "upon such conditions, and in accordance with such form", as he determines whilst the former section provides that he may "during the currency of a licence, by notice in writing to the licensee, vary or revoke any of the conditions upon which the licence is granted (not being conditions applicable by virtue of section one hundred and twenty-nine of this Act) or impose further conditions". As will be seen from a perusal of the two sections both the power to prescribe and the power to impose further conditions is, except for the bracketed words in s. 108, given without any express limitation. That the legislature should have given the power in this form rather than attempt a complete definition in advance of the matters relevant to the exercise of the power is readily understandable. But, nevertheless, the power in either case is inevitably subject to limitations which arise from the fact that it rests ultimately upon the authority of the Parliament of the Commonwealth to make laws with respect to a specified subject-matter, i.e. with respect to "Postal, telegraphic, telephonic and other like services". As Dixon J. (as he then was) said in Shrimpton v. The Commonwealth [1] concerning the "absolute discretion" which reg. 9 (2) of the National Security (Economic Organization) Regulations purported to repose in the Treasurer of the Commonwealth: "In the next place, I think the word "absolute" is actually concerned, not with insuring that the purposes for which the Treasurer may use his discretion are unlimited, but rather with the finality or conclusiveness of his decision. But finality, in the sense of complete freedom from legal control, is a quality which cannot, I think, be given under our Constitution to a discretion, if, as would be the case, it is capable of being exercised for purposes, or given an operation, which would or might go outside the power from which the law or regulation conferring the discretion derives its force. An exercise of a power, whether legislative or administrative, cannot rise higher than its source, viz., the power itself, and an attempt under the power to make unexaminable what is done in ostensible pursuance of a further delegation of authority must, to that extent, fail. Regulation 9 (2) should be construed down, and the discretion understood as relating to the purposes which in point of constitutional validity justify the regulation and as being "absolute" only within those limits" [2] . No question of the constitutional validity of any provision of the Act under consideration in this case, however, arises; the only question is whether the statutory grant of authority to impose further conditions extends to the imposition of the specified conditions. The answer to this question must depend, initially, upon whether the specified conditions are within the object and purpose for which the power was created, that is to say, whether the contemplated exercise of power is "for the purpose of attaining the object and securing the purpose" of the legislation, "such object and purpose being ascertained by an examination of the terms" of the legislation (per Latham C.J. in Shrimpton's Case [1] ). Secondly, it is beyond doubt that the power conferred by s. 108 does not extend to the imposition of conditions which are themselves repugnant to or inconsistent with the provisions of the Act. We do not understand either of these propositions to be disputed by the defendants but we have stated them because it is desirable that the basis upon which the argument proceeded should be defined.