Every registered buyer, as specified by a direction of the Registering Authority, shall, on and from the date of commencement of this Order, buy such percentage of his total purchase of tea, as may be directed from time to time by the Registering Authority in any calendar year, or such period, as may be specified in the direction, through public tea auctions in India, held under the control or auspices of the organisers of tea auctions licensed to do so under the provisions of this order.