The definition of "progress payment" in s 4 is as follows:
"In this Act:
progress payment means a payment to which a person is entitled under section 8, and includes (without affecting any such entitlement):
(a) the final payment for construction work carried out (or for related goods and services supplied) under a construction contract, or
(b) a single or one-off payment for carrying out construction work (or for supplying related goods and services) under a construction contract, or
(c) a payment that is based on an event or date (known in the building and construction industry as a 'milestone payment').
5 In the relevant design and construction contract between Dualcorp Pty Ltd (as subcontractor) and Remo Construction Pty Ltd (as contractor), clause 8 dealt with contracting sum, payment and security. Clause 8.3 dealt with payment claims and certificates and, relevantly, stated:
"(a) At the times stated in Annexure A, item 11, and upon the times set out in Clauses 8.9 and 8.13, the Subcontractor may submit a Payment Claim to the Contractor. Save for the formalities of Clauses 8.9 and 8.13, a Payment Claim must include the value and description of work carried out by the Subcontractor in the performance of the Agreement to the permissible reference date ('Payment Claim').
(b) Within 10 days after receipt of a Payment Claim, the Contractor must issue to the Subcontractor a Payment Certificate ('Payment Certificate') stating the amount of payment, which in the opinion of the Contractor, is to be made by the Contractor to the Subcontractor or by the Subcontractor to the Contractor ('Certified Amount'). The Contractor shall set out in the Payment Certificate the calculations employed to arrive at the Certified Amount and, if the Certified Amount is more than or less than the amount claimed in the Payment Claim, the reasons for the difference.
(c) A Payment Claim must be submitted and received by the Contractor on each permissible reference date as provided within Annexure A, item 11, and upon the times set out in Clauses 8.9 and 8.13.
(d) In the event that the reference date falls on a day other than a defined business day, then the Subcontractor must submit a Payment Claim on the subsequent business day."
6 Annexure A, Item 11 was in the following form:
"Date for submission of
payment claims: 15th of each month
(reference date)"
7 Clause 8.9 dealt with retention moneys. Clause 8.13 dealt with final payment claim in the following terms:
"Within 10 days after ground floor slab is formed up, the Subcontractor must submit to the Contractor a final Payment Claim endorsed as ('Final Payment Claim') being a Payment Claim subject to the terms of this Agreement under Clause 8, together with all claims showing all claimed adjustments to the Contract Sum and all amounts received by the Subcontractor up to the date of the expiration of the Defects Liability Period."
8 As can be seen from the Act, s 13(5) a claimant is limited to one payment claim in respect of each reference date. Section 13(6) permits, however, inclusion in another payment claim (necessarily by reference to another reference date) of an amount that has been the subject of a previous claim. Amongst other usual and uncontroversial examples, this permits the submission of cumulative payment claims by reference to later reference dates, which include an amount the subject of a previous claim. In such circumstances, if there has been an adjudication, s 22(4) will apply to require the same value to be given to such work, subject to the qualification in that subsection.
9 Here, Dualcorp, after undertaking the works, left the site in November 2007. It claimed to have substantially completed the works under the contract in November 2007.
10 A payment claim was made on 29 January 2008 attaching six invoices, four of which were dated 24 January 2008 and two of which were dated 29 January 2008. The relevant reference date was not identified on the claim or invoices.
11 On 3 March 2008, Dualcorp purported to serve a second payment claim annexing the same invoices and claiming the same amount. Again, no reference date was identified on the documentation.
12 Whether or not this was a final claim or a progress claim does not matter. The claim represented by the six invoices must have been in respect of only one reference date - either 15 December 2007 or 15 January 2008, if pursuant to Annexure A, Item 11 or the reference date pursuant to the operation of cl 8.13, if a final payment claim. In either case, there must have been one reference date under the contract or the last day of the month as provided for by the Act, s 8(2)(b).
13 I see no warrant under either the contract or the Act, s 8 for permitting a party in Dualcorp's position to create fresh reference dates by lodging the same claim for the same completed works in successive payment claims. That is not the intended operation of the last phrase of s 8(2)(b) ("and the last day of each subsequent named month").
14 Here, the work had been done; Dualcorp, the subcontractor, had left the site; it claimed payment by six invoices; six weeks later it repeated that claim by reference to the same invoices and, in my view, in respect of the same reference date. Dualcorp was prevented from serving the second payment claim. The terms of s 13(5) are a prohibition. The words "cannot serve more than one payment claim" are a sufficiently clear statutory indication that a document purporting to be a payment claim that is in respect of the same reference date as a previous claim is not a payment claim under the Act and does not attract the statutory regime of the Act.
15 For these reasons, Dualcorp was not entitled to proceed to judgment on a claim founded on the operation of the Act premised on the second payment claim of 3 March 2008 being a payment claim under the Act.
16 As to s 22(4) I agree with Macfarlan JA's approval of the approach of McDougall J to this section. I also agree that the Act as a whole generally manifests an intention to prevent repetitious reagitation of the same issues. The primary mechanism for the effectuation of that intention would appear to be ss 13(5) and 22(4). The former is sufficient to deal with the present controversy. I would leave to another occasion, should it be necessary, the consideration of principles of estoppel to prevent any apparently abusive operation of the Act not specifically covered by ss 13(5) and 22(4).
17 MACFARLAN JA: This is an application for leave to appeal from a decision of Quirk DCJ declining to enter summary judgment in favour of the applicant in the full amount claimed by it. The arguments of the parties have extended to those which would be put if leave were granted. Accordingly, it is open to the Court to determine now the appeal which would follow if the Court decided to grant leave.