The regulation as a whole provides, in language that clearly refers to any sale in South Australia, whether in the course of inter-State trade or not, that no margarine shall be sold in South Australia unless the ingredients thereof have been submitted for inspection at a place established and maintained at the expense of the manufacturer and approved by the Minister. Following the earlier provisions of the regulation sub-reg. (6) constitutes it an offence for any person to sell, offer for sale, or place on the market in South Australia any table margarine unless, in respect of the manufacture thereof, the specified records have been kept. But one may ask by whom are such records to be kept? Clearly enough, we should think, by the manufacturer. Yet under sub-reg. (7) any person who sells, offers for sale or places on the market in South Australia, any table margarine, may be required to produce the records mentioned in sub-reg. (6). This obligation, it will be seen, is placed not only on the manufacturer but on any person who sells margarine in South Australia and one may well inquire how a person of the latter class can ever be in a position to produce the records to which sub-reg. (6) refers, or cause them to be produced. Finally, sub-reg. (8) provides that every manufacturer who sells, offers for sale, or places on the market in South Australia any table margarine (whether manufactured in South Australia or elsewhere) shall furnish a return to the Minister once in every calendar month setting out the particulars required to be kept pursuant to these regulations. It seems to us that the regulation, as a whole, does, at many points, impair, and intends to impair, the freedom of inter-State trade. The requirement that no margarine, whether manufactured in South Australia or elsewhere, shall be sold or offered for sale in South Australia, unless, prior to manufacture, the ingredients have been submitted for inspection and unless the specified records have been kept by the manufacturer, is obnoxious to s. 92, and it seems that these provisions apply and were intended to apply to sales in South Australia whether in the course of inter-State trade or not. There are, in our view, other provisions in sub-reg. (6) which also impair the freedom of inter-State trade and it appears to us that they were framed on the view that s. 25a, which had recently been introduced into the Act, had a full operation according to its tenor and that it authorized the making of regulations applicable to all table margarine irrespective of whether that table margarine or other substance was or was not manufactured in South Australia. In our view, it is quite impossible to read down sub-reg. (6) so as to confine it within permissible legislative limits and, accordingly, it must be held to be invalid. It follows that the complaint in respect of this alleged offence must be dismissed.