16. Provision of postage stamps and power to make rules as to postage stamps

fix the price at which postage stamps shall be sold;

declare the classes of postal articles in respect of which postage stamps shall be used for the payment of postage or other sums chargeable under this Act;

prescribe the conditions with regard to perforation, defacement and all other matters subject to which postage stamps may be accepted or refused in payment of postage or other fees or sums;

regulate the custody, supply and sale of postage stamps;

declare the persons by whom the terms and conditions subject to which postage stamps may be sold; and

prescribe the duties and remuneration of persons selling postage stamps.