It cannot be said that the interpretation adopted by the Arbitrator was not reasonably open to him. Accordingly, it should not be disturbed.[23] Likewise the Arbitrator's views as to whether the delay costs so calculated, amounted to a penalty, were also reasonably open to him and disclose no manifest error of law.
62 To adapt the words of Knox CJ and Gavan Duffy J in Melbourne Harbour Trust Commissioners v Hancock: [24] "... on a consideration of all the terms of the contract and the nature and extent of the work to be done under it ..." the Arbitrator applied the provisions of the contract in a way which did not alter the fundamental undertakings originally given with respect to delay costs.
The Sixth Ground - That the Arbitrator Fell into Error in Awarding Interest on the Whole of the Uncertified Progress Payment Sum of $711,761 in that He Failed to Reduce the Amount Upon Which Interest Was to be Calculated by $408,000 Representing the Crane Based Variation Claim
63 The plaintiffs seek leave under both s.38(5)(b)(i) and (ii) of the Act.
64 The point raised was not identified in the material initially filed in support of the application for leave to appeal. In consequence, the plaintiffs also seek leave pursuant to r.4.11(3) of order 4 chapter 2 of the RSC to amend their grounds of appeal.
65 It seems to me that this latter application is more properly characterised as one to waive the requirements of r.4.07 which requires that within seven days after filing the originating motion, an applicant for leave to appeal shall file an affidavit in support of the application for leave to appeal. The rule requires that the affidavit set out the grounds of the proposed notice of appeal, and exhibit a copy of the proposed notice of appeal. The application to amend is in substance directed to the adequacy of the affidavit in support. There is as yet no notice of appeal and r.4.11 does not in strictness apply.
66 Written notice of the application for leave to amend the notice of appeal was given on 7 June 2006. There is no question that Abigroup has had adequate opportunity to respond to it. The relevant r.4.07 affidavit was filed on 8 December 2005.
67 The ground in issue relates to the Arbitrator's determination to award interest in respect of uncertified progress claim No. 29 in the sum of $711,761 from 3 March 2003 up until the time of any subsequent event which supplanted the entitlement.
68 There is affidavit evidence that there was some confusion on the part of the plaintiffs' legal advisers as to whether the point in issue arose as a result of the Arbitrator's first interim award of 3 November 2005 (being the subject of this proceeding) or his second interim award of 13 January 2006.
69 On 23 June 2006 Byrne J refused leave to extend time to appeal against the second interim award, finding first, that there was no evidence satisfactorily explaining the delay in making the application, and secondly, that the point had no prospects of success.
70 His Honour also observed that there was some force in the contention of Abigroup that the point in issue arose from the decision on the first interim award.
71 In my view the explanation for the relatively long delay in raising the point now raised in this proceeding is also less than satisfactory. Nevertheless it is the prospects of success which I regard as critical.
72 By progress claim No. 29 Abigroup claimed the balance allegedly owing by way of the difference between an adjusted contract sum of $49,031,322 and an amended progress certificate of $48,319,561.
73 It was common ground that the superintendent did not certify this claim. At [524]-[525] the Arbitrator observed: