62. Where any right, duty or liability would arise under a contract of sale by implication of law, it may be negatived or varied by express agreement or by the course of dealing between the parties, or by usage, if the usage is such as to bind both parties to the contract.

63. Where in this Act any reference is made to a reasonable time, the question what is a reasonable time is a question of fact

64. In the case of a sale by auction-(1) where goods are put up for sale in lots, each lot is prima facie deemed to be the subject of a separate contract of sale; (2) the sale is complete when the auctioneer announces its completion by the fall of the hammer or in other customary manner; and, until such announcement is made, any bidder may retract his bid; (3) a right to bid may be reserved expressly by or on behalf of the seller and, where such right is expressly so reserved, but not otherwise, the seller or any one person on his behalf may, subject to the provisions hereinafter contained, bid at the auction; (4) where the sale is not notified to be subject to a right to bid on behalf of the seller, it shall not be lawful for the seller to bid himself or to employ any person to bid at such sale, or for the auctioneer knowingly to take any bid from the seller or any such person; and any sale contravening this rule may be treated as fraudulent by the buyer; (5) the sale may be notified to be subject to a reserved or upset price; (6) if the seller makes use of pretended bidding to raise the price, the sale is voidable at the option of the buyer.

¹[64A. In the event of any duty of customs or excise or tax on any goods being imposed, increased, decreased or remitted after the making of any contract for the sale of such goods without stipulation as to the payment of duty or tax where duty or tax was not chargeable at the time of the making of the contract, or for the sale of such goods duty-paid or tax-paid where duty or tax was chargeable at the time,-(a) if such imposition or increase so takes effect that the duty or tax or increased duty or tax, as the case may be, or any part thereof, is paid, the seller may add so much to the contract price as will be equivalent to the amount paid in respect of such duty or tax or increase of duty or tax, and he shall be entitled to be paid and to sue for and recover such addition, and (b) if such decrease or remission so takes effect that the decreased duty or tax only or no duty or tax, as the case may be, is paid, the buyer may deduct so much from the contract price as will be equivalent to the decrease of duty or tax or remitted duty or tax, and he shall not be liable to pay, or be sued for or in respect of, such deduction.] Explanation. The word "tax" in this section means the tax payable under the Sales Tax Act,1951.

65. [Repealed by section 2 and Schedule of the Repealing Act, 1938 (Act No. I of 1938).]

66.(1) Nothing in this Act or in any repeal effected thereby shall affect or be deemed to affect- (a) any right, title, interest, obligation or liability already acquired, accrued or incurred before the commencement of this Act, or (b) any legal proceedings or remedy in respect of any such right, title, interest, obligation or liability, or (c) anything done or suffered before the commencement of this Act, or (d) any enactment relating to the sale of goods which is not expressly repealed by this Act, or (e) any rule of law not inconsistent with this Act. (2) The rules of insolvency relating to contracts for the sale of goods shall continue to apply thereto, notwithstanding anything contained in this Act. (3) The provisions of this Act relating to contracts of sale do not apply to any transaction in the form of a contract of sale which is intended to operate by way of mortgage, pledge, charge or other security.