7. Paragraph (ii) of sub-s. (2) provides that the commissioner shall refuse an application in any case where he is satisfied that the applicant is not of good character or has not the necessary fitness or experience or that the vehicles proposed to be used for the purposes of the service are not suitable or are not fit for such purposes. Then the third paragraph empowers the commissioner to refuse the inter-State licence if he thinks that the granting of a licence would endanger public safety. It is not easy to limit this expression to any particular degree of risk. One would suppose that the paragraph was pointed at the overcrowding of the roads and the use of vehicles that were too heavy or of excessive dimensions. It might cover some of the ground of par. (i) (c) and (d). But it is not really an objective test: it gives an indefinite, not to say, elastic criterion depending very much on the attitude or approach of the commissioner. Paragraph (iv) falls into two parts. First it says "subject to paragraphs (i), (ii) and (iii) of this subsection the commissioner shall grant an application for an inter-State licence." Paragraphs (ii) and (iii) expressly authorize a refusal and it is perfectly clear that the words "subject to" mean, in reference to those paragraphs, that they are paramount. Paragraph (i) does not in terms say that the application may be refused on the grounds it enumerates. But the words "subject to paragraph (i)" give it the same paramountcy and the section must mean that the matters it sets out must be considered as possible grounds for refusing to license the service. As pars. (ii) and (iii) cover so much of the ground comprised in par. (i), the point may not be so important as it might at first appear. But it seems clear enough that he may refuse an application for any reason that appears to the commissioner to fall within any one of the subjects mentioned in pars. (i), (ii) and (iii). If it could be shown that he had misconstrued the provisions and acted on a ground which was in truth extraneous he might be directed on mandamus to reconsider the application. But except in that not very likely event the applicant would have no remedy. The second part of par. (iv) goes on to say "but (the Commissioner) may - (a) impose terms and conditions reasonably necessary for the preservation of public safety, the regulation of traffic, the preservation and maintenance of roads, and the use and enjoyment by the public of roads; (b) require payment of a reasonable charge for the use by the vehicles approved for use in carrying on the licensed service in question of the roads on which those vehicles are so used." It is almost unnecessary to say that the conditions which the commissioner considers reasonably necessary for any one of the objects mentioned may be very restrictive and may form a real impediment to carrying on the trade. Yet it may be impossible to say that the imposition of the condition was beyond his power. The requirement that a charge should be paid by the licensee for the use of the roads raises the same question that was discussed with reference to s. 18 (4) (b) of the State Transport Co-ordination Act 1931-1954 (N.S.W.) in Hughes & Vale Pty. Ltd. v. State of New South Wales (No. 2) (1955) [1955] HCA 28; 93 CLR 127 . It is unnecessary to go over the same ground again. In the Queensland Act the charge is governed by s. 48K (2) and there are important differences from the provisions of the New South Wales sub-sections. The exaction is described as "a reasonable charge for the use by the vehicles approved for use in carrying on the service licensed under an inter-State licence of the roads on which those vehicles are used under the authority of the licence". Otherwise there is no guidance as to the shape it is to take or the basis of its assessment. The "amount of the charge" however is to be "calculated" in respect of each and every inter-State licence by a committee. The committee consists of the Under Secretary of the Treasury, the Commissioner of Main Roads, and the Commissioner for Transport or their deputies. The charge is payable by the licensee and "the amount as stated in an inter-State license of that charge, and of any and every instalment thereof, shall become due and payable, and shall be paid, to the commissioner at the time and in the manner stated in the license, and any unpaid amount may be recovered by the commissioner as a debt." It would seem that a specific "amount" is to be stated in the licence, yet the licence may be of any duration up to seven years (s. 31 (1)), and is renewable subject to the same grounds of objection as an original application (s. 48I). Further, it is provided by s. 48K (2) (ii) that the charge shall be payable equally by all inter-State licensees in respect of all vehicles of the same description and weight using the same roads and under the same circumstances. It may be possible to construe these provisions in a way that makes a mileage or ton mileage rate permissible, but at all events it is clear that a charge may be fixed which has no relation at all to the actual use of the roads. There is little doubt that it must be specified in the licence and it is by no means clear that it may be varied during the currency of the licence. The quantum is subject to no limitation except what the commissioner thinks to be reasonable. For once the "amount" is named in the licence it is fixed and supplies the measure of liability. What method of arriving at the charge will be employed is left entirely to the committee. The authority to make exaction cannot be justified on the grounds which form the subject of discussion in the New South Wales case [1955] HCA 28; (1955) 93 CLR 127 . Under s. 37 as modified by s. 48M approval of the vehicles must be obtained. Having regard to the views which have already been expressed in this and the New South Wales case [1955] HCA 28; (1955) 93 CLR 127 it is enough to say that, assuming par. (i) of s. 48M is sufficiently definite, the test laid down by par. (ii) may possibly be open to objection as involving a subjective judgment on the part of an administrative agency according to a standard that is too vague. (at p259)