1. Section 16(1) shall have effect in relation to any of the articles or substances described in Schedule 1 to this order where an order under that subsection is made which relates specifically to those articles or substances or to any class of those articles or substances and which specifies in relation to those articles or substances or classes one or more days and any reference in the Act to “the first appointed day” in any provisions of the Act which by virtue of Article 2 above are to have effect in relation to any of those articles or substances shall, in their application to them, be construed as referring to the day or days specified by virtue of this paragraph.