First, it was faintly submitted by the defendant that regard could not be had to what the arbitrator said concerning his correction of the award, because that would contravene the parties' agreement that a statement of the reasons for making the award would not be included therein. I do not agree. The arbitrator's letter of 18 February 1991 was not part of the amended award and did not purport to be a statement included in the amended award of a reason for making any part of it. It was the arbitrator's explanation of how the error which he corrected came to be made. If an error is not patent, it may be established by evidence; the arbitrator's letter was admitted without objection, and provides such evidence. In Mutual Shipping Corporation v Bayshore Shipping Co Ltd it was held that the court was entitled to look at the reasons given by an arbitrator expressly not as part of his award for the limited purpose of identifying the error open to be corrected, and the court also had before it a letter from the arbitrator to the parties explaining his unintentional transposition of the parties. In my view I am entitled to have regard to the arbitrator's letter . (my emphasis)
139 Mr Turner notes, however, that in Form-Quip, his Honour expressly referred to the fact that the evidence had been admitted without objection, whereas here there was a firm objection taken to the admission of evidence as to the arbitrator's subjective intention.
140 During the course of debate, there was a suggestion that there might be a difference between the court having regard to any (formal or informal) reasons of the arbitrator (as opposed to observations or comments made during the course of argument by the arbitrator) when the award was amended. If that be a relevant distinction (and bearing in mind the caution one must exercise in relying on comments in arguendo as authoritative - it having been observed by Kirby P, as his Honour then was, in Rajski v Bainton [1991] NSWCA 231 that "judges frequently put propositions in order to test them, without necessarily expressing any concluded opinion"), it might well be thought that what was said by the arbitrator at the time he corrected the award (as recounted by Ms Freeman, whose recollection I have no reason to doubt) was in the nature of ex tempore reasons. In any event, it seems to me that whether or not the statements in question could be characterised as reasons for the decision made by the arbitrator, what is relevant is that they indicate the arbitrator's immediate reaction to the position then put before him.
141 In determining objectively what was the arbitrator's original intention, one must look at what the arbitrator did and said (in his award) at the time he made the initial orders and, at the very least, at what he did (if not also what he said) when the asserted error was later put to him. Indeed, in Storey & Keers, McHugh JA said (at 453) "in general the test of whether a mistake or omission is accidental is that … if the matter had been drawn to the court's attention, would the correction at once have been made?" Similarly, in Newmont Yandal there was an acceptance that had the position been put to Austin J at the time the initial order was made he would "at once" have corrected the order (at [138]).
142 The immediate response of the arbitrator is an objective fact. Insofar as that response was evidenced by his conduct in indicating his intention to amend the orders in the way he did, that can be taken into account. Similarly, the fact that he made a particular statement (albeit one which involves his statement of subjective intention) may enable one to test objectively what his original intention had been. So, for example, if the arbitrator had debated for some time whether the initial orders were in fact the most appropriate (in light of the facts which had emerged since then or his then greater appreciation of the consequences of the original orders) then that might suggest that this was not a case where there was a mistake under the slip rule but rather it was a case where the arbitrator was having second or further thoughts as to the best way to proceed in light of the new information. However, if, as seems to be the case, the arbitrator had said (immediately the issue was raised) words to the effect 'no that is not what I had intended to happen' and indicated an immediate intention to amend the orders, then it is the very immediacy of that response which indicates objectively that the arbitrator had been mistaken as to the consequences of his order when he made the initial costs award.
143 As indicated earlier, I would have reached the conclusion that the arbitrator's original intention had been to appoint an independent cost assessor (and not himself to become involved directly in the assessment processes) based on the inconsistency between, on the one hand, making provision in his orders for the parties to agree their own cost assessor (or in default for one to be appointed by the body so nominated by him) and having, on the other hand, any intention to refer the matter for assessment in accordance with the court's assessment processes which do not permit this to occur (and having regard to the silence in the orders as to any ongoing role of the arbitrator, of the kind for which provision was later made in the amended orders). That inconsistency points to a mistake as to the effect or legal consequences of the order as framed. That mistake is explained by reference to a misunderstanding or lack of awareness of the technical definition of "assess" in the relevant legislation.
144 However, while it is not necessary for me to have regard to what was said on 1 March 2010 in order to find that there was a mistake or error in the initial orders in that they did not reflect the arbitrator's objective intention as discerned from the award and reasons themselves, I think it is permissible to have regard to what the arbitrator said on 1 March 2010 in assessing the immediacy (and unqualified nature) of his response to the discovery of the error (and this supports the conclusion I have drawn).
145 I therefore consider there to have been an error arising from an accidental slip or omission so as to enliven the power to correct the award (had it been otherwise valid) under s 30(b) of the Commercial Arbitration Act. I am not, however, convinced that there was a defect of form in the orders themselves in that the problem was not confined to use of an incorrect word (as a matter of form) but was one as to the inconsistency in the process sought to be implemented (which seems to me a matter of substance) so I would not have found that the power under s 30(d) was enlivened.
146 In any event, given that I have found that the initial orders were a nullity as they were beyond power, there is no need for the slip rule to have been enlivened in order to find (as I do) that the arbitrator had power to make the orders on 1 March 2010.
(iii) Was this an amendment falling within the scope of the slip rule?
147 Again, this issue does not arise having regard to the finding made in (i) above. However, had it arisen I would have found that the amendment in fact made went beyond the scope of the power to amend contained in s 30.
148 The question is whether, in correcting his mistake, the arbitrator was amending his orders to reflect his actual intention at the time or coming to a different decision (albeit one designed to produce a similar end result) in relation to a matter already determined by him.
149 The arbitrator's objective intention, as assessed from the terms in which the initial orders were made (and the lack of provision for any ongoing role by the arbitrator in the cost assessment process), I find to have been that the costs were to be assessed by an independently appointed cost assessor (and I would be prepared to infer that he intended this to be in accordance with the standard assessment criteria adopted by costs assessors appointed by the court or practising in this field) but that he did not intend personally to be further involved in the process. It could be inferred from that that the arbitrator did not intend the cost assessment to take place as a formal procedure under the provisions set out in the Legal Profession Act since it is difficult to see how an external assessment process could be made compatible with that carried out under the Act.
150 There is nothing in what the arbitrator is reported to have said on 1 March 2010 which suggests that he had originally intended to play a formal role in the settlement of the costs. Therefore, even if reference is made to what the arbitrator in fact said, it seems to me to go no further than to support the conclusion that the arbitrator did not originally intend that the assessment of costs should take place under the administrative processes of this court. There is nothing in the orders to suggest that he intended himself to play any part in the process (and his preliminary reasons make that very clear). Therefore, the arbitrator's oral reasons on 1 March 2010 at the end take the matter no further than can be gleaned from the arbitrator's initial reasons and award (with the possible exception that the arbitrator's reported reaction to the likely cost of a formal itemised bill of cost process might indicate that this was not something which the arbitrator had taken into account in the exercise of his initial discretion and thus might support an argument of the kind now put by Micro which was, in effect, that what had happened was that the arbitrator was simply having second thoughts about any process which might include such a step).
151 Accepting that there was a mistake on the arbitrator's part as to what would be the consequences of what he had ordered in the first place, the arbitrator does not seem simply to have 'corrected' that mistake in the sense of putting in place the costs assessment procedure he originally intended (and which I have found he had no power to do). Rather, he has put in place a new procedure (no doubt intended to have a similar effect to what he originally had in mind) but this time involving his direct participation (which I do not believe can be said to have been his objective intention at the time of the initial orders).
152 I would be inclined to infer that the reason for this change was because the arbitrator realised that without his direct involvement there was no way to have the costs assessed without referring the matter to cost assessment in accordance with the court processes, but that is immaterial. What is material is that the amendments made to the orders put in place something other than what I have found was the arbitrator's original intention objectively ascertained.
153 That seems to me to be going beyond the scope of the power of correction in s 30. There is nothing, in my view, to suggest that the arbitrator had turned his mind to the possibility (let alone intended) that he would be directly involved in the costs assessment process after the making of his cost award and his reasons are inconsistent with any such involvement.