However, subsection (5) does not prevent the claimant from including in a payment claim an amount that has been the subject of a previous claim. 32 Amongst the basic and essential requirements which are preconditions to a valid adjudicator’s determination is “service by the claimant on the respondent of a payment claim (s 13)” [Brodyn, [53]. Were the matter unaffected by authority, Mr Parker’s 34 argument - that that requirement was not satisfied, in the light of s 13 (4), by purported service of a claim more than 12 months after the construction work was last carried out – might have warranted closer consideration, but decisions of Campbell J and McDougall J, which I am far from prepared to say are plainly wrong, are to the contrary. 33 In Lifestyle Retirement Projects No.2 Pty Ltd v Parisi Homes Pty Ltd [2005] NSWSC 705, Campbell J (at [19]) held that precise compliance with s 13 (4) was not a basic requirement essential to validity of a determination. His Honour said: 18 It must immediately be noted that the language of section 13 (2) is in one sense mandatory, in stating what a payment claim “must” do. By different verbiage, section 13 (4) is likewise, in that same sense, mandatory by saying that the payment claim “may be served only within” a particular period of time. 19 In my view, consistently with Project Blue Sky Inc v Australian Broadcasting Authority (1998) 194 CLR 355 at 390-391, the question of what was intended to be essential for compliance with the basic requirements of a determination is not decided solely by these textual matters. 35 The fact that the language of section 13 (4) is in one sense mandatory shows that it sets out a “requirement”, but not that it is a basic and essential requirement. Rather, the question of what is essential needs to be decided, bearing in mind the object and purpose of the legislation. It is concerned with providing a quick and relatively easy way in which an obligation to make a payment on account of what ultimately might be found to be due can be established. Viewed in that light, I do not find that precise compliance with section 13 (4) is a basic requirement which is essential to a purported determination actually being a determination under the Act. Rather, section 13 (4) is one of the “more detailed requirements”, which Hodgson JA held exist in the Act. When there has been a document which purports to be a Payment Claim served, the fact (if it were a fact) that the construction work to which the claim relates was last carried out more than 12 months before the payment claim was served does not mean that the “basic and essential requirement” of “service ... of a payment claim (s 13)” has not been complied with. And even if it turned out that the adjudicator was mistaken in deciding that section 13 (4) had been complied with, that would not mean that his 36 determination was void, when he has addressed in a bona fide way the question of whether section 13 (4) has been complied with. 34 And in Energetech Australia Pty Ltd v Sides Engineering Pty Ltd [2005] NSWSC 801, McDougall J (at [25]) concluded that compliance with s 13 (4) was not “basic and essential” in the relevant sense. His Honour explained why: 25 Secondly, I think (and this may be no more than a variant or consequence of the first reason) the requirement of s 13 (4) is not "basic and essential" within the meaning of that phrase as it was explained by Hodgson JA in Brodyn. It may be readily understood (if I may say so with respect) why the matters identified by his Honour in that paragraph have the "basic and essential" quality to which he refers. As to the first, the terms of the Act are not engaged if there is no construction contract. Equally, in terms of the second, third and fourth alternatives, there is no valid adjudication unless they are engaged. Finally, in the case of the fifth requirement, it is simply a reflection of the statutory duty cast upon the adjudicator. 37 26 Those matters do not by and large require the investigation and resolution of difficult questions of fact or law. Usually, it will be clear whether or not there is a construction contract (particularly having regard to the wide definition of that expression in s 4 of the Act); and equally it will usually be clear whether (for example) a document of the kind described by s 13(1) has been served. 27 However, when one looks at the question of s 13 (4), a determination of the point raised by that question necessarily involves considerations of questions of fact, in the context of the relevant statutory provisions. The entitlement may well be conditional upon (in this case) service of a payment claim within the period determined or in accordance with the terms of the contract. That, however, I think, is a matter for the adjudicator to determine. If it is a matter for the adjudicator to determine, then, consistent with the approach indicated in Brodyn at 441 [54], it is a matter that, prima facie, does not fall within the "basic and essential requirement". [68] Therefore when a challenge is made which is said to go to the jurisdiction of the Adjudicator, the Adjudicator is still at liberty to decide on the exact nature of the non-compliance to see if it falls within the 38 "basic and essential requirement" of the Act or that it is a matter of construction with respect to whether there is a Payment Claim due under the construction contract as he understands it. The following analysis in Pacific GNRL Securities (supra) is helpful: "Is the determination void for insufficient specificity in the payment claim? 44 The Owners submit that there was non-compliance with a basic and essential requirement prescribed in the Act for there to be a valid determination, in that the payment claim did not sufficiently specify the construction work in respect of which it was made. 45 Although precision and particularity is required to a degree sufficient to apprise the parties of the real issues in dispute, regard may be had to the familiarity which the parties will have with construction industry practices and the formality and particularity of a pleading is not expected [Multiplex Constructions Pty Ltd v Luikens [2003] NSWSC 1140, [76]]. A payment claim is not a nullity for non-compliance with s 13(2)(a), at least unless the non-compliance is patent on the face of the claim [Nepean Engineering Pty Ltd v Total Process Services Pty Ltd (in liq) [2005] NSWCA 409, 39 [34] – [39] (Hodgson JA), [46] – [48] (Santow JA)]. Moreover, compliance with s 13(2) is not a basic requirement fundamental to the validity of an adjudication, but one of the “more detailed requirements”, exact compliance with which is not essential to a valid determination [Brodyn, [54] – [55]]. 46 In fact, it is plain that the “period” referred to in the payment claim is the period since the last progress claim (of June 2004), and the claim is apportioned across several heads showing the percentage complete under each. Mr Dixon conceded in cross-examination that he understood precisely what was being claimed. 47 It follows that the determination is not void for insufficient specificity in the payment claim, since it sufficiently specified the construction work in respect of which it was made, and even if it did not, the sufficiency of a payment claim is not a basic and essential requirement non-compliance with which results in invalidity, but a matter within the jurisdiction of the adjudicator to determine, rightly or wrongly." (emphasis added) [69] Whilst in New South Wales' Act, the setting aside of an Adjudication Determination is by way of judicial review, the observations on jurisdiction can be analogously applied in our context when a 40 jurisdictional point is raised in a setting aside as in the Adjudicator had acted in excess of jurisdiction. In Brodyn Pty Ltd t/as Time Cost and Quality v Davenport & Anor [2004] NSWCA 394, it was explained as follows: "51 I agree with McDougall J that the scheme of the Act appears strongly against the availability of judicial review on the basis of non-jurisdictional error of law. 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). The remedy provided by s 27 can only work if a claimant can be confident of the protection given by s 27 (3): if the claimant faced the prospect that an adjudicator's determination could be set aside on any ground involving doubtful questions of law, as well as of fact, the risks involved in acting under s 27 would be prohibitive, and s 27 could operate as a trap. 41 52 However, it is plain in my opinion that for a document purporting to an adjudicator's determination to have the strong legal effect provided by the Act, it must satisfy whatever are the conditions laid down by the Act as essential for there to be such a determination. If it does not, the purported determination will not in truth be an adjudicator's determination within the meaning of the Act: it will be void and not merely voidable. A court of competent jurisdiction could in those circumstances grant relief by way of declaration or injunction, without the need to quash the determination by means of an order the nature of certiorari. 53 What then are the conditions laid down for the existence of an adjudicator's determination? The basic and essential requirements appear to include the following: