At least in a case of the ordinary Australian citizen returning by air from overseas, the description of the purported impost (see s. 34A(1)) as a "fee for immigration clearance of that passenger" did not suffice to make the impost a "fee for services" in any relevant sense. As has been said, such a citizen had, under the law, the right to re-enter the country, without need of any Executive fiat or "clearance", for so long as he retained his citizenship. The subjection of such a citizen to administrative procedures at the point of entry (see Migration Regulations, reg. 4) may be necessary, in the public interest, to enable the entry of non-citizens to be prevented or controlled and to enable proper administrative records and procedures to be kept or followed in relation to the arrival and departure of citizens and non-citizens alike. A requirement that a returning citizen submit, in the public interest, to the inconvenience of such administrative procedures at the end of a journey cannot, however, properly be seen as the provision or rendering of "services" to, or at the request or direction of, the citizen concerned. Nor is it possible to find in s. 34A (or in any other provision of the Act) any identification of particular services provided or rendered to the individual passenger for which the impost could relevantly be regarded as a fee or quid pro quo. As has been seen, the section neither fixed the amount of the fee nor indicated the considerations to which the Executive was required to pay regard in prescribing it. In these respects, the impost which s. 34A purported to exact is to be contrasted with the nominated statutory fee of ten dollars (no other having been prescribed) for the processing of a particular individual's application to become an approved pathologist which was held not to be a tax in General Practitioners Society v. The Commonwealth [8] . Indeed, one need do no more than refer to the second reading speech of the responsible Minister, to which both sides referred the Court, to confirm that the moneys intended to be raised by the purported impost were not related to particular services to be supplied to particular passengers but were intended to provide, when paid into consolidated revenue, a general off-setting of the administrative costs of certain areas of the relevant Commonwealth Department, including, for example, the administrative costs involved in maintaining facilities for the issue of visas in overseas countries and "general administrative overheads". Therefore, the fee which s. 34A purported to exact was, at least in so far as it related to passengers who were Australian citizens, a tax and the provisions of the section were, for relevant purposes, a law "imposing taxation". We turn to consider the effect on the validity of the amending Act of that conclusion.