Since I reject the operator's submission on construction it follows that the only remaining contention that can avail it is one which attacks the validity of reg. 106A. It is said that to the extent to which the regulation purports to concern itself with travel beyond sectors which begin or end in Australia, travel beyond Kuala Lumpur to ultimate destinations in Europe or Asia being an instance, it not only exceeds the regulation-making power conferred by the Air Navigation Act but also the legislative power of the Commonwealth. The wide terms in which the power to make regulations is conferred by s. 26 of the Air Navigation Act are such as to make it unnecessary to consider the first of these two suggested grounds of invalidity: if the regulations are within legislative power they will fall within the statutory power to make regulations. Nor can it, in my view, be doubted but that the Commonwealth has ample power to legislate with respect to aspects of travel, wherever geographically occurring, which have a sufficient connexion with travel by air between Australia and overseas. Reliance only upon the trade and commerce power conferred by s. 51 (i.), without need for recourse to the external affairs power in s. 51 (xxix.), will provide a source of power to legislate with respect to on-carriage beyond the first overseas stopping place, in this case Kuala Lumpur, at least where the example of international trade or commerce in question is one involving, as in this case, ultimate destinations themselves lying beyond that first overseas stopping place and where what is legislated for is, as is again this case, the arranging in Australia of travel to those ultimate destinations. How much more extensive the power may be calls for no present investigation. It is enough to conclude that the power is emple to authorize the regulation of charges to be paid for in Australia in respect of travel to or from Australia on all sectors of flights to overseas destinations.