PRIMA FACIE CASE
8 It was not disputed, at least for the purpose of the present proceedings, that the Second and Third Defendants must be taken to be on notice of what I will call for convenience the right of pre-emption. This was because the option included as an annexure a contract for sale of the relevant property attaching to which was a folio identifier that in turn referred to the Plaintiffs' registered lease. This concededly put the Second Defendant on notice of its terms, including the right of pre-emption. Nor could it be really disputed that the Second Defendant must have been on notice that the right of pre-emption had been triggered by the grant of the option to the Third Defendant. The Second Defendant knew it was acquiring no more than the Third Defendant could confer by virtue of the very option agreement pursuant to which the Second Defendant was nominated. Thus on a prima facie basis, at least, the Second Defendant must be taken to be on notice not only of the right of pre-emption but also that it had been triggered, with the result that by its terms the lessee was entitled to an offer in the same terms as that constituted by the option itself. Whilst there is no evidence either way as to the actual state of knowledge of the Second Defendant beyond that, certainly it could fairly be said that the Second Defendant was on constructive notice of these matters and thus on enquiry as to whether the Plaintiffs had exercised their right of pre-emption or waived it.
9 Whether a right of pre-emption constitutes a mere equity prior to the event triggering it has been settled by the authorities. Such an unfructified right of pre-emption was described in the following terms by Street J in Mackay v Wilson (1947) 47 SR(NSW) 315 at 325:
'But an agreement to give 'the first refusal' or 'a right of pre-emption' confers no immediate right upon the prospective purchaser. It imposes a negative obligation on the possible vendor requiring him to refrain from selling the land to any other person without giving the holder of the right of first refusal the opportunity of purchasing in preference to any other buyer. It is not an offer and in itself it imposes no obligation on the owner of the land to sell the same. He may do so or not as he wishes. But if he does decide to sell, then the holder of the right of first refusal has the right to receive the first offer, which he also may accept or not as he wishes. The right is merely contractual and no equitable interest in the land is created by the agreement."
10 Here however, the event triggering the right of pre-emption can be taken to have occurred. That in turn poses the question which is more difficult and controversial, namely whether, a right of pre-emption so triggered becomes equivalent to an option and thus from that time of its fructification confers an equitable interest over the relevant property. I dealt with that question in Transfield Properties v Amos Aked Swift Pty Ltd (1994) 36 NSWLR 321 at 341 where I concluded that such a right of pre-emption did, on triggering confer an equitable interest coincident with its fructification:
"The more difficult and controversial question is whether, when the right of first refusal is, as it were, triggered by the relevant contingency, so as to then constitute an option to the grantee to exercise such right and thereby acquire the relevant property, subject to compliance with the terms of the right of first refusal, does from this point the grantee of the right of refusal have an equitable interest in the land? Thus it might said that there is no difference in principle between the situation of an option at the outset, which confers an equitable interest in land and an option which arises later upon the triggering of a right of first refusal, other than their temporal order."