"Conversely, if one party is contractually entitled to terminate the agreement on breach by the other, he may be held to have waived his right to terminate."
"'Waiver' is a word which is sometimes used loosely to describe a number of different legal grounds on which a person may be debarred from asserting a substantive right which he once possessed or from raising a particular defence to a claim against him which would otherwise be available to him. We are not concerned in the instant appeal with the first type of waiver. This arises in a situation where a person is entitled to alternative rights inconsistent with one another. If he has knowledge of the facts which give rise in law to these alternative rights and acts in a manner which is consistent only with his having chosen to rely on one of them, the law holds him to his choice even though he was unaware that this would be the legal consequence of what he did. He is sometimes said to have 'waived' the alternative right, as for instance a right to forfeit a lease or to rescind a contract of sale for wrongful repudiation or breach of condition; but this is better categorised as 'election' rather than as 'waiver'."
"The result of this appeal turns, in my opinion, upon the answer to two and only two questions. First, what is the meaning of the withdrawal clause. Second, whether the owners have waived the default of the charterers in not making punctual payment."
"It must mean that once a punctual payment of any instalment has not been made, a right of withdrawal accrues to the owners. Conversely, it is incapable of meaning that a charterer who has failed to make a punctual payment can (unless the owners have waived the default) avoid the consequences of his failure by later tendering an unpunctual payment. He would still have failed to make a punctual payment and it is on this failure and by reason of it that the owners get the right to withdraw."
"Although the word 'waiver', like 'estoppel', covers a variety of situations different in their legal nature, and tends to be indiscriminately used by the courts as a means of relieving parties from bargains or the consequences of bargains which are thought to be harsh or deserving of relief, in the present context what is relied on is clear enough. The charterers had failed to make a punctual payment but it was open to the owners to accept a late payment as if it were punctual, with the consequence that they could not thereafter rely on the default as entitling them to withdraw. All that is needed to establish waiver, in this sense, of the committed breach of contract, is evidence, clear and unequivocal, that such acceptance has taken place, or, after the late payment has been tendered, such a delay in refusing it as might reasonably cause the charterers to believe that it has been accepted."
"2. The owners must within a reasonable time after the default give notice of withdrawal to the charterers. What is a reasonable time—essentially a matter for arbitrators to find—depends on the circumstances. In some, indeed many cases, it will be a short time—viz. the shortest time reasonably necessary to enable the shipowner to hear of the default and issue instructions. If, of course, the charterparty contains an express provision regarding notice to the charterers, that provision must be applied. 3. The owners may be held to have waived the default, inter alia, if when a late payment is tendered, they choose to accept it as if it were timeous, or, if they do not, within a reasonable time give notice that they have rejected it."
"The conduct relied on is the continuing attempts to agree the specification, method statement and warranties which subsisted up to 25 November."
"If the buyer does not meet his payment obligations according to cl. 3(1) and (2) of this agreement within 5 business days after the due date, the seller is entitled to withdraw from this contract without reminder or setting a deadline."
"In my judgment, there is of course a middle ground between acceptance of repudiation and affirmation of the contract, and that is the period when the innocent party is making up his mind what to do. If he does nothing for too long, there may come a time when the law will treat him as having affirmed. If he maintains the contract in being for the moment, while reserving his right to treat it as repudiated if his contract partner persists in his repudiation, then he has not yet elected. As long as the contract remains alive, the innocent party runs the risk that a merely anticipatory repudiatory breach, a thing 'writ in water' until acceptance, can be overtaken by another event which prejudices the innocent party's rights under the contract—such as frustration or even his own breach. He also runs the risk, if that is the right word, that the party in repudiation will resume performance of the contract and thus end any continuing right in the innocent party to elect to accept the former repudiation as terminating the contract."