37. The parties to a contract must either perform, or offer to perform, their respective promises, unless such performance is dispensed with or excused under the provisions of this Act, or of any other law. Promises bind the representatives of the promisors in case of the death of such promisors before performance, unless a contrary intention appears from the contract.Illustrations (a) A promises to deliver goods to B on a certain day on payment of Taka 1,000. A dies before that day. A's representatives are bound to deliver the goods to B, and B is bound to pay the Taka 1,000 to A's representatives. (b) A promises to paint a picture for B by a certain day, at a certain price. A dies before the day. The contract cannot be enforced either by A's representatives or by B.

38. Where a promisor has made an offer of performance to the promisee, and the offer has not been accepted, the promisor is not responsible for non-performance, nor does he thereby lose his rights under the contract. Every such offer must fulfil the following conditions:– (1) it must be unconditional: (2) it must be made at a proper time and place, and under such circumstances that the person to whom it is made may have a reasonable opportunity of ascertaining that the person by whom it is made is able and willing there and then to do the whole of what he is bound by his promise to do: (3) if the offer is an offer to deliver anything to the promisee, the promisee must have a reasonable opportunity of seeing that the thing offered is the thing which the promisor is bound by his promise to deliver. An offer to one of several joint promisees has the same legal consequences as an offer to all of them.Illustration A contracts to deliver to B at his warehouse, on the 1st March, 1873, 100 bales of cotton of a particular quality. In order to make an offer of a performance with the effect stated in this section, A must bring the cotton to B's warehouse, on the appointed day, under such circumstances that B may have a reasonable opportunity of satisfying himself that the thing offered is cotton of the quality contracted for, and that there are 100 bales.

39. When a party to a contract has refused to perform, or disabled himself from performing his promise in its entirety, the promisee may put an end to the contract, unless he has signified, by words or conduct, his acquiescence in its continuance.Illustrations (a) A, a singer, enters into a contract with B, the manager of a theatre, to sing at his theater two nights in every week during the next two months, and B engages to pay her 100 Taka for each nights performance. On the sixth night A wilfully absents herself from the theatre. B is at liberty to put an end to the contract. (b) A, a singer, enters into a contract with B, the manager of a theatre, to sing at his theatre two nights in every week during the next two months, and B engages to pay her at the rate of 100 Taka for each night. On the sixth night A wilfully absents herself. With the assent of B, A sings on the seventh night. B has signified his acquiescence in the continuance of the contract, and cannot now put an end to it, but is entitled to compensation for the damage sustained by him through A's failure to sing on the sixth night.

40. If it appears from the nature of the case that it was the intention of the parties to any contract that any promise contained in it should be performed by the promisor himself, such promise must be performed by the promisor. In other cases, the promisor or his representatives may employ a competent person to perform it.Illustrations (a) A promises to pay B a sum of money. A may perform this promise, either by personally paying the money to B or by causing it to be paid to B by another; and, if A dies before the time appointed for payment, his representatives must perform the promise, or employ some proper person to do so. (b) A promises to paint a picture for B. A must perform this promise personally.

41. When a promisee accepts performance of the promise from a third person, he cannot afterwards enforce it against the promisor.

42. When two or more persons have made a joint promise, then, unless a contrary intention appears by the contract, all such persons during their joint lives, and after the death of any of them his representative jointly with the survivor or survivors, and after the death of the last survivor, the representatives of all jointly, must fulfil the promise.

43. When two or more persons make a joint promise, the promisee may, in the absence of express agreement to the contrary, compel any one or more of such joint promisors to perform the whole of the promise. Each of two or more joint promisors may compel every other joint promisor to contribute equally with himself to the performance of the promise, unless a contrary intention appears from the contract. If any one of two or more joint promisors makes default in such contribution, the remaining joint promisors must bear the loss arising from such default in equal shares. Explanation – Nothing in this section shall prevent a surety from recovering from his principal, payments made by the surety on behalf of the principal, or entitle the principal to recover anything from the surety on account of payments made by the principal.Illustrations (a) A, B and C jointly promise to pay D 3,000 Taka. D may compel either A or B or C to pay him 3,000 Taka. (b) A, B and C jointly promise to pay D the sum of 3,000 Taka. C is compelled to pay the whole. A is insolvent, but his assets are sufficient to pay one-half of his debts. C is entitled to receive 500 Taka from A's estate, and 1,250 Taka from B. (c) A, B and C are under a joint promise to pay D 3,000 Taka. C is unable to pay anything, and A is compelled to pay the whole. A is entitled to receive 1,500 Taka from B. (d) A, B and C are under a joint promise to pay D 3,000 Taka, A and B being only sureties for C. C fails to pay. A and B are compelled to pay the whole sum. They are entitled to recover it from C.

44. Where two or more persons have made a joint promise, a release of one of such joint promisors by the promisee does not discharge the other joint promisor or joint promisors; neither does it free the joint promisors so released from responsibility to the other joint promisor or joint promisors.

45. When a person has made a promise to two or more persons jointly, then, unless a contrary intention appears from the contract, the right to claim performance rests, as between him and them, with them during their joint lives, and, after the death of any of them, with the representative of such deceased person jointly with the survivor or survivors, and, after the death of the last survivor, with the representatives of all jointly.Illustration A, in consideration of 5,000 Taka lent to him by B and C, promises B and C jointly to repay them that sum with interest on a day specified. B dies. The right to claim performance rests with B's representative jointly with C during C's life, and after the death of C with the representatives of B and C jointly.

46. Where, by the contract, a promisor is to perform his promise without application by the promisee, and no time for performance is specified, the engagement must be performed within a reasonable time. Explanation – The question "what is a reasonable time" is, in each particular case, a question of fact.

47. When promise is to be performed on a certain day, and the promisor has undertaken to perform it without application by the promisee, the promisor may perform it at any time during the usual hours of business on such day and at the place at which the promise ought to be performed.Illustration A promises to deliver goods at B's warehouse on the first January. On that day A brings the goods to B's warehouse, but after the usual hour for closing it, and they are not received. A has not performed his promise.

48. When a promise is to be performed on a certain day, and the promisor has not undertaken to perform it without application by the promisee, it is the duty of the promisee to apply for performance at a proper place and within the usual hours of business. Explanation – The question "what is a proper time and place" is, in each particular case, a question of fact.

49. When a promise is to be performed without application by the promisee, and no place is fixed for the performance of it, it is the duty of the promisor to apply to the promisee to appoint a reasonable place for the performance of the promise, and to perform it at such place.Illustration A undertakes to deliver a thousand maunds of jute to B on a fixed day. A must apply to B to appoint a reasonable place for the purpose of receiving it, and must deliver it to him at such place.

50. The performance of any promise may be made in any manner, or at any time which the promisee prescribes or sanctions.Illustrations (a) B awes A 2,000 Taka. A desires B to pay the amount to A's account with C, a banker. B, who also banks with C, orders the amount to be transferred from his account to A's credit, and this is done by C. Afterwards, and before A knows of the transfer, C fails. There has been a good payment by B. (b) A and B are mutually indebted. A and B settle an account by setting off one item against another, and B pays A the balance found to be due from him upon such settlement. This amounts to a payment by A and B, respectively, of the sums which they owed to each other. (c) A owes B 2,000 Taka. B accepts some of A's goods in reduction of the debt. The delivery of the goods operates as a part payment. (d) A desires B, who owes him Taka 100, to send him a note for Taka 100 by post. The debt is discharged as soon as B puts into the post a letter containing the note duly addressed to A.

51. When a contract consists of reciprocal promises to be simultaneously performed, no promisor need perform his promise unless the promisee is ready and willing to perform his reciprocal promise.Illustrations (a) A and B contract that A shall deliver goods to B to be paid for by B on delivery. A need not deliver the goods, unless B is ready and willing to pay for the goods on delivery. B need not pay for the goods, unless A is ready and willing to deliver them on payment. (b) A and B contract that A shall deliver goods to B at a price to be paid by installments, the first installment to be paid on delivery. A need not deliver, unless B is ready and willing to pay the first installment on delivery. B need not pay the first installment, unless A is ready and willing to deliver the goods on payment of the first installment.

52. Where the order in which reciprocal promises are to be performed is expressly fixed by the contract, they shall be performed in that order; and, where the order is not expressly fixed by the contract, they shall be performed in that order which the nature of the transaction requires.Illustrations (a) A and B contract that A shall build a house for B at a fixed price. A's promise to build the house must be performed before B's promise to pay for it. (b) A and B contract that A shall make over his stock-in-trade to B at a fixed price, and B promises to give security for the payment of the money. A's promise need not be performed until the security is given, for the nature of the transaction requires that A should have security before he delivers up his stock.

53. When a contract contains reciprocal promises, and one party to the contract prevents the other from performing his promise, the contract becomes voidable at the option of the party so prevented; and he is entitled to compensation from the other party for any loss which he may sustain in consequence of the non-performance of the contract.Illustration A and B contract that B shall execute certain work for A for a thousand Taka. B is ready and willing to execute the work accordingly, but A prevents him from doing so. The contract is voidable at the option of B; and, if he elects to rescind it, he is entitled to recover from A compensation for any loss which he has incurred by its non-performance.

54. When a contract consists of reciprocal promises, such that one of them cannot be performed, or that its performance cannot be claimed till the other has been performed, and the promisor of the promise last mentioned fails to perform it, such promisor cannot claim the performance of the reciprocal promise, and must make compensation to the other party to the contract for any loss which such other party may sustain by the non-performance of the contract.Illustrations (a) A hires B's ship to take in and convey, from Chittagong to the Mauritius, a cargo to be provided by A, B receiving a certain freight for its conveyance. A does not provide any cargo for the ship. A cannot claim the performance of B's promise, and must make compensation to B for the loss which B sustains by the non-performance of the contract. (b) A contracts with B to execute certain builder's work for a fixed price, B supplying the scaffolding and timber necessary for the work. B refuses to furnish any scaffolding or timber, and the work cannot be executed. A need not execute the work, and B is bound to make compensation to A for any loss caused to him by the non-performance of the contract. (c) A contracts with B to deliver to him, at a specified price, certain merchandise on board a ship which cannot arrive for a month, and B engages to pay for the merchandise within a week from the date of the contract. B does not pay within the week. A's promise to deliver need not be performed, and B must make compensation. (d) A promises B to sell him one hundred bales of merchandise, to be delivered next day, and B promises A to pay for them within a month. A does not deliver according to his promise. B's promise to pay need not be performed, and A must make compensation.

55. When a party to a contract promises to do a certain thing at or before a specified time, or certain things at or before a specified times, and fails to do any such thing at or before the specified time, the contract, or so much of it as has not been performed, becomes voidable at the option of the promisee, if the intention of the parties was that time should be of the essence of the contract.

If it was not the intention of the parties that time should be of the essence of the contract, the contract does not become voidable by the failure to do such thing at or before the specified time; but the promisee is entitled to compensation from the promisor for any loss occasioned to him by such failure.

If, in case of a contract voidable on account of the promisor's failure to perform his promise at the time agreed, the promisee accepts performance of such promise at any time other than that agreed, the promisee cannot claim compensation for any loss occasioned by the non-performance of the promise at the time agreed, unless, at the time of such acceptance he gives notice to the promisor of his intention to do so.

56. An agreement to do an act impossible in itself is void.

A contract to do an act which, after the contract is made, becomes impossible, or, by reason of some event which the promissor could not prevent, unlawful, becomes void when the act becomes impossible or unlawful.

Where one person has promised to do something which he knew, or, with reasonable diligence, might have known, and which the promisee did not know to be impossible or unlawful, such promisor must make compensation to such promisee for any loss which such promisee sustains through the non-performance of the promise.Illustrations (a) A agrees with B to discover treasure by magic. The agreement is void. (b) A and B contract to marry each other. Before the time fixed for the marriage, A goes mad. The contract becomes void. (c) A contracts to marry B, being already married to C, and being forbidden by the law to which he is subject to practise polygamy. A must make compensation to B for the loss caused to her by the non-performance of his promise. (d) A contracts to take in cargo for B at a foreign port. A's Government afterwards declares war against the country in which the port is situated. The contract becomes void when war is declared. (e) A contracts to act at a theatre for six months in consideration of a sum, paid in advance by B. On several occasions A is too ill to act. The contract to act on those occasions becomes void.

57. Where persons reciprocally promise, firstly, to do certain things which are legal, and, secondly, under specified circumstances, to do certain other things which are illegal, the first set of promises is a contract, but the second is a void agreement.Illustration A and B agree that A shall sell B a house for 10,000 Taka but that, if B uses it as a gambling house, he shall pay A 50,000 Taka for it. The first set of reciprocal promises, namely, to sell the house and to pay 10,000 Taka for it, is a contract. The second set is for an unlawful object, namely, that B may use the house as a gambling house, and is a void agreement.

58. In the case of an alternative promise, one branch of which is legal and the other illegal, the legal branch alone can be enforced.Illustration A and B agree that A shall pay B 1,000 Taka for which B shall afterwards deliver to A either rice or smuggled opium. This is a valid contract to deliver rice, and a void agreement as to the opium.

59. Where a debtor, owing several distinct debts to one person, makes a payment to him, either with express intimation, or under circumstances implying that the payment is to be applied to the discharge of some particular debt, the payment, if accepted, must be applied accordingly.Illustrations (a) A owes B, among other debts, 1,000 Taka upon a promissory note which falls due on the first June. He owes B no other debt of that amount. On the first June A pays to B 1,000 Taka. The payment is to be applied to the discharge of the promissory note. (b) A owes to B, among other debts the sum of 567 Taka. B writes to A and demands payment of this sum. A sends to B 567 Taka. This payment is to be applied to the discharge of the debt of which B had demanded payment.

60. Where the debtor has omitted to intimate and there are no other circumstances indicating to which debt the payment is to be applied, the creditor may apply it at his discretion to any lawful debt actually due and payable to him from the debtor, whether its recovery is or is not barred by the law in force for the time being as to the limitation of suits.

61. Where neither party makes any appropriation the payment shall be applied in discharge of the debts in order of time, whether they are or are not barred by the law in force for the time being as to the limitation of suits. If the debts are of equal standing, the payment shall be applied in discharge of each proportionally.

62. If the parties to a contract agree to substitute a new contract for it, or to rescind or alter it, the original contract need not be performed.Illustrations (a) A owes money to B under a contract. It is agreed between A, B and C that B shall thenceforth accept C as his debtor, instead of A. The old debt of A to B is at an end, and a new debt from C to B has been contracted. (b) A owes B 10,000 Taka. A enters into an arrangement with B, and gives B a mortgage of his (A's) estate for 5,000 Taka, in place of the debt of 10,000 Taka. This is a new contract and extinguishes the old. (c) A owes B 1,000 Taka under a contract. B owes C 1,000 Taka. B orders A to credit C with 1,000 Taka in his books, but C does not assent to the arrangement. B still owes C 1,000 Taka, and no new contract has been entered into.

63. Every promisee may dispense with or remit, wholly or in part, the performance of the promise made to him or may extend the time for such performance, or may accept instead of it any satisfaction which he thinks fit.Illustrations (a) A promises to paint a picture for B. B afterwards forbids him to do so. A is no longer bound to perform the promise. (b) A owes B 5,000 Taka. A pays to B, and B accepts, in satisfaction of the whole debt, 2,000 Taka paid at the time and place at which the 5,000 Taka were payable. The whole debt is discharged. (c) A owes B 5,000 Taka. C pays to B 1,000 Taka, and B accepts them, in satisfaction of his claim on A. This payment is a discharge of the whole claim. (d) A owes B, under a contract, a sum of money, the amount of which has not been ascertained. A, without ascertaining the amount, gives to B, and B, in satisfaction thereof, accepts, the sum of 2,000 Taka. This is a discharge of the whole debt, whatever may be its amount. (e) A owes B 2,000 Taka and is also indebted to other creditors. A makes an arrangement with his creditors, including B, to pay them a composition of eight annas in the Taka upon their respective demands. Payment to be of 1,000 Taka is a discharge of B's demand.

64. When a person at whose option a contract is voidable rescinds it, the other party thereto need not perform any promise therein contained in which he is promisor. The party rescinding a voidable contract shall, if he have received any benefit thereunder from another party to such contract, restore such benefit, so far as may be, to the person from whom it was received.

65. When an agreement is discovered to be void, or when a contact becomes void, any person who has received any advantage under such agreement or contract is bound to restore it, or to make compensation for it to the person from whom he received it.Illustrations (a) A pays B 1,000 Taka in consideration of B's promising to marry C, A's daughter. C is dead at the time of promise. The agreement is void, but B must repay A the 1,000 Taka. (b) A contracts with B to deliver to him 250 maunds of rice before the first of May. A delivers 130 maunds only before that day, and none after. B retains the 130 maunds after the first of May. He is bound to pay A for them. (c) A, a singer, contracts with B, the manager of a theatre, to sing at his theatre for two nights in every week during the next two months, and B engages to pay her a hundred Taka for each night's performance. On the sixth night, A wilfully absents herself from the theatre, and B, in consequence, rescinds the contract. B must pay A for the five nights on which she had sung. (d) A contracts to sing for B at a concert for 1,000 Taka which are paid in advance. A is too ill to sing. A is not bound to make compensation to B for the loss of the profits which B would have made if A had been able to sing, but must refund to B the 1,000 Taka paid in advance.

66. The rescission of a voidable contract may be communicated or revoked in the same manner, and subject to the same rules, as apply to the communication or revocation of a proposal.

67. If any promisee neglects or refuses to afford the promisor reasonable facilities for the performance of his promise, the promisor is excused by such neglect or refusal as to any non-performance caused thereby.Illustration A contracts with B to repair B's house. B neglects or refuses to point out to A the places in which his house requires repair. A is excused for the non-performance of the contract if it is caused by such neglect or refusal.