11 ABC contends that the issue of the final certificate by the superintendent put an end to any claim made by Lifese. It says that the position of the claim is the same as a determination made by an adjudicator under the statutory scheme, established under Part 3, Division 2 of the Building and Construction Act. It relies particularly on the following passage from the judgment of McDougall J
50 As I have already said, the Act (at least implicitly) recognises that adjudicators may err. That is why an adjudicator's determination is not finally conclusive of rights and liabilities under the contract. (I recognise that, absent reviewable error, such a determination may be regarded as conclusive of an entitlement to the amount of a progress payment; but that is a different matter.)
51 In a practical sense, a final determination of a balance owing under a construction contract may "undo" the effect of a prior determination by an adjudicator of the amount of a progress payment. But that is because the final determination - however it is made - establishes, on a final basis, the amount owing by one party to the other. If the final determination is made by a court, or arbitral or other tribunal, of competent jurisdiction then it establishes finally and conclusively (of course, subject to any appeal that may lie) the relevant rights of the parties to the contract.
52 In the present case, the contract authorises the superintendent (in the first instance) to make a final determination of the balance due by one party to the other in respect of work under the contract. There is no reason why a final determination by the superintendent could not "undo" the effect of a prior determination by an adjudicator, in just the same way as a final determination by a court or arbitral or other tribunal might do so. Of course, the contract provides for a process of review of determinations by the superintendent (cl 45); there is no equivalent review process for the decisions of courts or arbitral or other tribunals (and such rights of appeal as there may be are not to be equated to the kinds of review for which cl 45 provides). But this relates to the finality of the superintendent's determination. It says nothing as to the subject matter of that determination, or as to its effects on prior determinations by adjudicators. [my emphasis]