11. Where after weighing in pursuance of a request under paragraph 9 the weight of the solid fuel is found to be not less than, as the case may be,—N.I.
(a)that purporting to be contained in the relevant number of any securely closed containers in which the fuel is made up, having regard to the weight marked on each of those containers;
(b)that which is made known to the buyer in accordance with paragraph 3(1)( b);
(c)that purporting to be contained in the relevant number of containers having regard to the weight stated on a notice displayed on a vehicle in accordance with paragraph 5(2) or an indication of quantities so displayed in accordance with an order under paragraph 7(2)( a); or
(d)that stated by the seller in any document delivered to the buyer at or before the delivery of the fuel to him;
the buyer shall be liable to repay to the seller all costs reasonably incurred by the seller in connection with the weighing.