It is common ground that the obligation imposed by Condition A6 is objective, that is, it is not conditioned on the subjective knowledge or ability of a particular vendor. However, I accept that breach of the obligation may be more readily shown in the case of a major developer, with enhanced ability to get service from expert consultants. For example, a delay by a small developer in replacing a dilatory consultant might be excusable, although a similar delay by a large developer with an array of consultants on call might not be.
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My opinion is that Condition A6 should be read as a promise by the vendor, as a developer, that the vendor will, as a developer, "do everything reasonably necessary" to have the plan registered within the plan registration time. In my opinion, that meant that, in relation to matters of the kind usually attended to by a developer, that is, matters not involving specialist expertise, the vendor's obligation is unqualified. This would, in my opinion, include such things as co-ordinating the documentation necessary for the application, co-ordinating specialist contractors, and negotiating with councils and adjoining owners and the like. In relation to these matters, in my opinion the vendor/developer would be fully responsible or any deficiencies or delay in work done by its agents, if this work is left to agents.
However, there are other matters which may be considered matters of specialist expertise, which a developer would normally leave to an architect, engineer or builder : to an architect, the drawing of plans and supervision of building work; to an engineer, similar tasks; and to a builder, actual execution of the work. In those matters, in my opinion the independent contractors should not be regarded as agents of the developer in carrying out the developer's role in obtaining registration of the strata plan. Accordingly, delays attributable to independent contractors in carrying out those tasks would not ipso facto involve a breach of the vendor's obligation. Thus, where a builder caused delay by walking off the site because of problems the builder had which were unrelated to the job, that was not considered a breach of the vendor's obligation: Woodcock v Parlby Investments Pty Ltd.
However, even where delay arises from the conduct of independent contractors in carrying out matters of specialist expertise, there may be associated breaches by the vendor/developer itself, for example in selection of the contractors, in provision of instructions and information, in monitoring progress, and/or in falling to replace the specialist expert when this should have been done.
The final matter which requires brief consideration is the relationship between a breach of obligation, such as Condition A6, and the expiration of the time with which the strata plan has to be registered. In Sanctuary Investments Pty Ltd v St Gregory's Armenian School Incorporated Young J said that one must "look at whether the person seeking to rescind the contract materially contributed to the non-performance of the condition on which it now bases its rescission. In my opinion, this means that if the time would plainly have expired, even if the breach had not occurred, the breach will not preclude the vendor relying on the condition. However, in my opinion, if one could say that, if the breach had not occurred, there as a substantial chance that the condition would have been fulfilled, that would be enough to deprive the vendor of the right to rescind. If the vendor's breach has deprived the purchaser of such a substantial chance of this kind, in my opinion, that is enough to enable one to say that the breach has materially contributed to the non-fulfilment of the condition, so that the vendor is precluded from rescinding.[67] (emphasis added and citations omitted)