Spiers Earthwords PL v Landtec Projects Corporation PL (No. 2)  WASCA 53 (Spiers v Landtec) revisited the prevention principle in the context of the AS 2124-1986 standard contract (which is similar to the often used AS2124-1992 contract). The contractor claimed that it was prevented from reaching practical completion in respect of a contract for road works which had a 10 week completion period, and that the principal could not impose liquidated damages for the delay beyond the date for practical completion. The contractor claimed that the principal failed to supply sufficient or suitable material, that rectification was performed with unsuitable material, that additional works were undertaken at the principal's requests, that the principal made design changes and that there was inclement weather and also latent conditions.
The principal responded by saying that the contractor had not given notice requesting an extension of time (relying on the principle from the Turner cases). The contractor responded to this by saying that the principal requested additional work and the principal and superintendent had not responded to the contractor's requests for extensions of time, and was therefore estopped from relying on the contractor's failure to issue a notice under the contractual extension of time provisions.
The trial judge found that the principal was estopped from relying on the notice requirements of clause 35.5 in relation to 42 days, being a combination of additional work and rain delay, and that the date of the contract should be extended by 42 days. The contractor appealed this (although the finding was in the contractor's favour) as the contractor's position was that it didn't seek an extension of time, but instead sought that time be 'at large' (i.e. that completion occur within a reasonable time) by reason of the preventative conduct of the principal. The New South Wales Court of appeal upheld the trial judge's decision.
The contract in question (AS2124-1986) had a clause which expressed that principal or superintendent caused delays do not cause time to be set 'at large', in clause 35.5:
A delay by the Principal or the failure of the Superintendent to grant a reasonable extension of time or to grant an extension of time within 28 days shall not cause the Date for Practical Completion to be set at large but nothing in this paragraph shall prejudice any right of the Contractor to damages.McLure P said that the Court was bound to follow Peninsula Balmain Pty Ltd v Abigroup Contractors Pty Ltd  NSWCA 211, which upheld the Turner cases. Peninsula Balmain approved the Turner cases, and also is authority for the proposition that the power of the superintendent to extend time in the absence of the required contractual notice from the contractor was to be exercised in the interests of both the principal and the contractor, and the superintendent is obliged to act honestly and impartially in considering whether to do so. The result in Peninsula Balmain was that the referee appointed by a court extended the date for practical completion as it considered that the superintendent (which didn't extend the time) ought to have done so.
In obiter, McLure P cast doubt on the proposition that anyone other than the superintendent can grant an extension of time (at ). That is, in Peninsula Balmain the referee exercised the power of the superintendent to extend time, but McLure P didn't consider that this was a power that could have been exercised by anyone other than the superintendent.
In Spiers v Landtec the contractor argued, along the lines set out in Peninsula Balmain, that (at ):
- the respondent had breached its duty to ensure the superintendent acted honestly and fairly as a result of the superintendent's breach of his duty to consider and, if appropriate, grant the appellant's requests for an extension of time regardless of the absence of any relevant notice; and
- in the alternative, by reason of waiver and/or estoppel of the requirement for notice, the superintendent was in breach of his obligation to consider and, if appropriate, grant an extension of time.
McLure P noted that the contractor's propositions ignored the paragraph in clause 35.5 set out above and that its purpose was 'to prevent the prevention principle having the effect of setting time at large' (at  and ):
61 Whether and to what extent cl 35.5 is intended to exclude the application of the prevention principle is a matter of contractual construction. The objectively determined purpose of cl 35.5 is at least twofold. The first is to provide contractual machinery to prevent the time for practical completion being set at large as a result of the application of the prevention principle. The second is to place on the principal the risk of delay caused loss not attributable to any contractual party. However, it would appear its purpose is not to exclude the prevention principle itself insofar as it applies to delay caused by the principal's breach of the building contract. In the absence of an extension of time under cl 35.5, the contractor would be entitled to damages against the principal for its breach of contract, including any damages (liquidated or otherwise) it suffered as a result of principal-caused delays in practical completion. Whether or not that could be relied on as a defence (such as equitable set-off) does not have to be decided. In the result, cl 35.5 brings the prevention principle back into line with the general contractual principles relating to the implied duty to cooperate. Accordingly, it is unnecessary to determine whether contractual parties are free to exclude the implied duty to cooperate, which is a term implied by law.
62 The same analysis would apply to a (derivative) breach by the principal arising from a superintendent's breach of the duty to consider the exercise of the power in cl 35.5. Moreover, it is arguable that the prevention principle is a relevant consideration in the exercise of the superintendent's discretion to extend time in relation to the 'non-breach' causes of delay specified in cl 35.5. If a court or another decision-maker concludes that the superintendent should have exercised the power and granted an extension of time, the principal will be prevented from claiming liquidated damages for the relevant (proven) delay. In summary, the relevant purpose of cl 35.5 is to prevent the prevention principle having the effect of setting time at large.McLure P held that on her analysis the principal would not be entitled to liquidated damages for the period for which the appellant should have been given an extension of time under clause 35.5, and upheld the decision of the trial judge. Newnes JA agreed with McLure P on these grounds.
Spiers v Landtec is particularly important for two reasons (in the context of the 'prevention principle'):
- The Court has questioned whether anyone other than the superintendent can extend time. This requires an analysis of the relevant contract the subject of a dispute to ascertain the scope of the power to extend time, and to determine whether anyone else can exercise this power.
- The Court has noted that the prevention principle is alive and well, at least to the extent that a principal may be precluded from relying on a claim for liquidated damages for a particular period of time during which that principal has contributed to the delay.
One of the difficulties, however, with the analysis of McLure P is that it is unclear how the conclusion is reached that the principal is not entitled to liquidated damages for the 42 days. For instance, it is not characterised by McLure P as an entitlement of the contractor in estoppel, despite the trial judge finding that this is how it was to be characterised.