4.—(1) The Price Controller may from time to time by order published in the Gazette —
(a)
fix maximum prices, which may include charges for delivery, for the sale of any goods either by declaring the maximum sale price, or by prescribing that the sale price of the goods shall not exceed the price which they cost the seller, plus a stated sum or a stated percentage of that cost price, or by prescribing the manner in which the maximum sale price of the goods shall be ascertained;
(b)
fix the maximum charge that may be made by any person for any service in relation to the supply, repair, maintenance, packing, carriage or storage of goods, which shall include the provision of such materials as may be specified in the order;
(c)
fix the maximum price, or prescribe the manner in which the maximum price shall be ascertained, of any secondhand goods, whether for sale by persons who trade in those goods, or by the private owners of those goods; and
(d)
prescribe what shall constitute a wholesale or retail quantity or transaction either generally or in respect of any special class or classes of goods.
(2) Under this section the Price Controller may fix a maximum price or charge for service in respect of any goods for one area which differs from the maximum price or the charge for services fixed for another area in respect of like or similar goods.