(b) may make such orders as it considers appropriate for the restitution of any amount so paid, and such other orders as it considers appropriate, having regard to its decision in those proceedings."
44 Any liability arising under the Act, whether prior to or by virtue of a determination or translated into a judgment, has been described as an interim progress payment on account (Brodyn Pty Ltd v Davenport [2003] NSWSC 1019 at [18] per Einstein J), and in Multiplex Constructions Pty Ltd v Luikens [2003] NSWSC 1140 at [96] Palmer J spoke of the scheme of the Act as "pay now, argue later". There are many cases in which this has been recognised. In Brodyn Pty Ltd v Davenport (2004) 61 NSWLR 421 Hodgson JA, Mason P and I agreeing, said at [51] -
"The Act discloses a legislative intention to give an entitlement to progress payments, and to provide a mechanism to ensure that disputes concerning the amount of such payments are resolved with the minimum of delay. The payments themselves are only payments on account of a liability that will be finally determined otherwise: ss 3(4), 32. The procedure contemplates a minimum of opportunity for court involvement: ss 3(3), 25(4)."
45 The respondent cannot oppose a payment claim, or if there is a judgment upon filing an adjudication certificate cannot seek to impugn the judgment, in reliance on matters arising under the contract, so rights under the contract are preserved and can be otherwise asserted. The statutory liability established by an adjudicator's determination can be challenged only on limited grounds: Brodyn Pty Ltd v Davenport (2004). So it is open to the respondent (or the claimant - an adjudicator's determination may be adverse to a claimant) to contend in a final working out of the contractual mechanisms or in other proceedings for a result different from that determined by the adjudicator. Statutory liability otherwise than that established by an adjudicator's determination is also not final, and either party may in the course of a final determination contend for a different result, see s 32(1) and (2). Section 32(3)(a) then states the obvious, that there must be allowance in any other proceedings for an amount which has been paid. Section 32(3)(b) may be unnecessary, because an order in the other proceedings that the claimant pay money to the respondent will have the effect of restitution; however, it does enable an order for restitutionary interest and, if there has been a judgment upon filing an adjudication certificate, an order contrary to the judgment: as was said by Handley JA in Falgat Construction Pty Ltd v Equity Australia Corporation Pty Ltd (2005) 62 NSWLR 385 at [21] -
"Finally, s 3(b) makes a judgment entered under s 25 on an adjudication certificate provisional only, both in what it grants and in what it refuses. A builder can pursue a claim in the courts although it was rejected by the adjudicator and the proprietor may challenge the builder's right to the amount awarded by the adjudicator and obtain restitution of any amount it has overpaid."
46 Thus the RTA (and John Holland) remained entitled to assert and enforce their rights under the contract. That included, in the RTA's case, to contend as to the Spoil monies that John Holland was to be paid for the excavation work in Cut 4 under Pay Item R42P15.1, or was not to be paid for it at all; as to the Latent Condition monies that there was not a latent condition; and as to the Detonator Dump monies that the Superintendent's certification of the claim had been correct. The contractual mechanisms for working out the parties' rights under the contract still operated, and had to be followed - the adjudicated claims were only part of the contractual tapestry. In giving effect to the contractual mechanisms there would have to be allowance for the amounts paid, quite apart from s 32(3)(a). If it came to proceedings (including arbitration under the "arbitration process" in the contract), the parties' rights under the contract would again be worked out with allowance as recognised in s 32(3)(a), and perhaps orders as contemplated by s 32(3)(b) although there could be an order that John Holland pay money to the RTA without the necessity to call it an order for restitution of money paid under or for the purposes of the Act.
47 Under the contract the time will come when the Superintendent issues a Final Payment Schedule. Whether or not it is a species of the genus of Payment Schedules, and for that reason could include amounts which the Principal was entitled to deduct (cl 42.1.2), it may include on one side of the ledger payment of nil or of only $1,815,390 for the Spoil Claim work, and so on for the other adjudicated amounts; and on the other side of the ledger the payments of the adjudicated amounts to John Holland. The result may be that it sets out an amount determined by the Superintendent as an amount finally due from John Holland to the RTA (cl 42.7.2.), and if it does that amount will be "in connection with the work under the Contract" (ibid).
48 John Holland will then be contractually obliged to pay the amount to the RTA (cl 42.7.4). If it disputes its liability on the ground that it was entitled to payment of an amount or of more than $1,815,390 for the Spoil Claim work, the dispute resolution procedures in cl 45 may be engaged, and so also with respect to the other adjudicated amounts. John Holland will not be limited to contending for the adjudicated amounts - it will be open to it, for example, to contend that it was entitled to the $5,721,654.45 claimed in the Detonator Dump claim rather than the $4,845,760.59 determined by the adjudicator. There could be curial proceedings outside the contractual dispute resolution procedures.
49 John Holland accepted, as recorded by McDougall J at his [9], that the RTA "intends to prosecute the claims made in the Cross-Summons and that [it] is acting bona fide in doing so". The intention and bona fides must extend to a working out of the contractual mechanisms, and to bona fides in the RTA anticipating an outcome that John Holland must pay to it an amount greater than the value of half the security. That contractual obligation to pay is arguably within John Holland's "due and proper performance of the Contract" in cl 5.1, but it is certainly within "the obligations of the Contractor under the Contract" in cl 5.1. The security can be held for the purpose of satisfying the obligation, as is reinforced by cl 42.7.4(b) specifically in connection with payment of an amount shown due in a Final Payment Schedule, and by cl 46 more generally referring to deduction from the security of "any debt due from the Contractor to the Principal under or by virtue of any provision of the Contract". On the basis favourable to John Holland earlier mentioned, a purpose in the RTA outside that for which the power in cl 5.7 was conferred has not been shown.
50 At the hearing of the appeal there was debate over cl 42.7.1(d), by which the Final Payment Schedule was to be issued if "(d) there are no outstanding claims or disputes between the Contractor and the Principal". Did it mean that the Final Payment Schedule could not issue until every claim or dispute had been brought to finality, including by decision of the RTA's claims in its cross-summons? Or were claims or disputes not "outstanding" for the purposes of the clause if the Superintendent or the Principal had made a determination, notwithstanding that there could be dispute or difference in relation to the determination? Sensible contract administration would suggest the latter, as could the conclusion to cl 45.7 earlier set out so far as it contemplated arbitration after the issue of a Final Payment Schedule of disputes not in relation to the Final Payment Schedule.
51 John Holland and the RTA took opposed positions, and sought thereby to support their respective cases. I do not think it matters, and it is not necessary to come to a conclusion. In the uncomfortable event that the Final Payment Certificate must await decision of the RTA's claims in its cross-summons, the decision will be that John Holland must pay nil or some amount to the RTA. If there is an amount, it may or may not be in terms of restitution. Whether or not it is in those terms, the Superintendent will include the amount on the appropriate side of the ledger in determining the amount finally due from one party to the other. It would be no different if the Final Payment Certificate had to await, for example, the arbitration of a dispute or difference. And the process of determining the amount finally due from the Principal to the Contractor or from the Contractor to the Principal (cl 42.7.2) will be the same, save that, the Superintendent's or Principal's determination of entitlement to the Spoil monies and other money the subject of the adjudications will be included in the ledger, if the Final Payment Certificate can issue before every claim or dispute has been brought to finality.
52 The key submission by John Holland was that the RTA's entitlement to recover the adjudicated amounts arose under s 32 of the Act, from which it argued that any obligation on its part was not an obligation under the contract. On one view, the RTA need not have claimed recovery of the adjudicated amounts by filing its cross-summons; it could have awaited the Final Payment Certificate. It did claim recovery of the adjudicated amounts, but (on the assumption of no other disputes) as a way of arriving at the final determination of the parties rights and obligations, presumably one which could then be taken up in the Final Payment Certificate. Even then, it did not confine its claim to a restitutionary order pursuant to s 32 of the Act; and in any event such an order would recognise and give effect to the RTA's contractual rights and John Holland's correlative obligations, with the obligation under the order emboding John Holland's obligations under the contract. It would still fall within the purposes derived from cl 5.1.
53 The entitlement to hold security for payment of money, payment being one of the obligations under a contract, is not lost when the contractual obligation has "passed into judgment" (the phrase is from Blair v Curran (1939) 62 CLR 484 at 532 per Dixon J). That is so whether the judgment is an order made in the exercise of the court's general powers or, so far as s 32(3)(b) of the Act gives a special power, in the exercise of the special power under the Act. But the RTA may achieve recovery of the adjudicated amounts otherwise than by a restitutionary order pursuant to s 32 of the Act, and whatever the basis of an order whereby it is entitled to recovery there will be (whether apart from decision of the cross-summons or after decision) a Final Payment Certificate which, if it shows money owing from John Holland to the RTA, is a contractual obligation apt for recourse to the security. The key submission is in my opinion untenable.
54 In the course of oral submissions John Holland put a different submission, albeit one not fully articulated; I should seek to record and deal with it. It was to the effect that upon practical completion John Holland was entitled under cl 5.7 to what was called "interstitial" return of half the security, simply because a Certificate of Practical Completion had issued. It was said, as I understand it, that there was the entitlement even if there were no question of payment and recovery of adjudicated amounts and there were other claims or disputes outstanding which could result in John Holland having to pay money to the RTA. This submission, which does not seem to have been made to McDougall J did not turn upon an improper purpose of securing the cross-summons recovery. Why there was the entitlement was not explained, beyond the assertion that it was reasonable for John Holland to get back half the security.
55 It is sufficient to say that nothing in the contract supports entitlement to interstitial return of security, and it can not stand with the discretion in cl 5.7, the direct provision in cl 42.7.4 that there is no obligation to release security until payment of money due under a Final Payment Schedule, and the implicit provision in cl 46 to the same effect. John Holland submitted that these provisions should be read as applying only to the half security left after return pursuant to cl 5.7. This assumed what was in question, and there is neither contractual nor common-sense reason to do so.