DECISION
31 In my opinion, the Vendors should not now be permitted to allege invalidity in their own Notice to Complete. As shown by Abela, had the Vendors made this allegation below, it would have been open to the Purchaser to allege estoppel, and to lead further evidence in support of that allegation.
32 It is true that on 20 August 2001, the Purchaser asserted that the Notice to Complete was invalid; and that it impliedly repeated this assertion on 28 August. But on 29 August, the Purchaser demonstrated that it was ready, willing and able to complete and then it purportedly terminated the contract. Even if it be contended by the Vendors that the Purchaser could not then be relying on any representation by the Vendors, because the Vendors had by then extended the time for compliance with the Notice to Complete, it would have been open to the Purchaser to lead evidence that, despite the Purchaser's assertions of 20 August and 28 August, it did act in reliance on the Vendors' assertions that its Notice to Complete was valid, and that it correctly determined that, in those circumstances, particularly where the Vendors were still insisting that time was of the essence, the Vendors could not unilaterally extend the time from that specified in the notice.
33 In all the circumstances, this is a matter where evidence could have altered the situation, so it is not a case where the new argument should be permitted on appeal: see Suttor v. Gundowda Pty. Limited (1950) 81 CLR 418 at 438.
34 In any event, I do not think this submission could have succeeded. When the Notice to Complete was given, the time for completion specified in the contract had passed. The Purchaser was in breach of cl.4.1, in circumstances where the Purchaser could not claim that its breach was caused by any breach of cl.4.2 by the Vendors: the Purchaser did not know about the Vendors' breach until 24 August. By giving the Notice to Complete on 14 August, requiring completion on 29 August, in my opinion the Vendors waived compliance with cl.4.1. As stated by Mahoney J in Falconer at 145, a notice making time of the essence must state with reasonable explicitness what it is that it requires to be done. If the Vendors were still requiring the Purchaser to comply with cl.4.1, that is, to submit a transfer at least 14 days before completion, the notice would have meant that the transfer should be submitted the following day, that is on 15 August. In my opinion, the more reasonable interpretation of the notice is that it required only completion, waived the submission of the transfer, and proceeded on the basis that the Vendors would themselves prepare a transfer which they would then have executed in time for completion. On that construction, the Vendors' breach of cl.4.2 became irrelevant, and there was no basis for saying that the Notice to Complete was invalid.
35 I note that one aspect of the judgment of Mahoney J in Falconer was disapproved by the High Court in Louinder v. Leis (1982) 149 CLR 509 at 522-4, but that disapproval did not relate at all to the principles I have referred to.
36 Turning to the other points argued, my opinion that by serving the Notice to Complete, the Vendors waived compliance with cl.4.1, means that the Vendors cannot rely on the late submission of the transfer to excuse their failure to settle on the day appointed by the Notice to Complete. In any event, in the circumstances of this case, the prudent thing for the Vendors to have done would have been to prepare a form of transfer and have it executed to ensure that the Vendors were in a position to settle at the time they had specified.
37 Although no previous case has dealt with the situation where a party giving a Notice to Complete has purported to extend the time specified in it, the matter is I think determined by the principle that both parties are bound by a valid Notice to Complete, once it has been given. In addition, as pointed out by Mr. Officer, any other view would be productive of great uncertainty. Presumably, any notice extending the time would have to be given a reasonable time before the time specified, producing real questions as to what would be a reasonable time. Once a Notice to Complete has been given, the other party would presumably feel obliged to incur whatever trouble and expense was necessary to comply with it, which could be wasted if the party giving the Notice to Complete could simply extend the time which it specified.
38 For these reasons, in my opinion the appeal should be dismissed. It is not necessary to express any view as to Mr. Officer's submission that the Vendors, having re-sold the property, cannot now claim forfeiture of the deposit.
39 The order I propose is: appeal dismissed with costs.
40 The respondent sought an order for indemnity costs on the basis of an exchange of correspondence, in which the respondent invited the consent of the appellant to the appeal being dismissed with an order for costs in the respondent's favour. On the whole, I do not think this justifies any special order as to costs.
41 SANTOW JA: I agree with Hodgson JA.