Consideration
31 On 14 August 2023, the first orders as to the filing of evidence by the parties were made by consent, which required Hilton to file any evidence by 7 November 2023. On 3 November 2023, by consent, that order was extended to 20 December 2023.
32 This application has only come about at this time because of difficulties the Commissioner has experienced with retaining a legal expert to opine on the issues referred to at [11] above, (noting it has already obtained a commercial expert to do so). There was no suggestion before this time by the Commissioner that the nature of the matter was such that a joint expert report ought to be ordered. No authority could be pointed to where a joint expert had been ordered in these circumstances, with the Commissioner acknowledging this is a "very unusual application".
33 I am not persuaded that such an order should be made.
34 First, the accepted consequence of making an order is that Hilton would not be entitled to rely on the expert evidence it is well advanced in preparing. This would prejudice Hilton in the conduct of its case. It is to be assumed that the expert evidence it intends to file supports its position on the appeal. If the joint expert expresses a different view, Hilton could only cross-examine that expert. It would be deprived of evidence it had sought to rely on. Hilton bears the onus of proof in the substantive proceeding. It is entitled to file the expert report it has obtained. Any issues of admissibility of its content, and the weight to be attached to it, are matters for the substantive proceeding.
35 Second, the Commissioner's submission that Hilton would not be prejudiced because it could use the work it has done to date with the expert it intended to rely on to prepare for cross-examination of the joint expert, does not take account of the prejudice referred to above at [34]. Rather, it confines the issue of prejudice to the expenses incurred in preparation of evidence on which it could no longer rely. There is no basis to do so.
36 Third, the Commissioner's application for a Court-appointed expert will not decrease costs, as Hilton has already retained its own expert and incurred the expense of obtaining a report, to be filed shortly. That Hilton could use in cross-examination any work it has done to date in relation to the expert they had intended to file does not establish otherwise.
37 Fourth, the timetable suggested by the Commissioner if the application is granted - which would not, prima facie, delay the proceedings - is based on the proposition that there should be no issue in determining the factual assumptions and questions to be asked of the expert. That proposition is not acceded to by Hilton, who submitted that these matters, or at least some, will be the subject of contest. Moreover, in this process, an expert would need to be identified, which as returned to below, may be problematic. If one is unable to be identified, the Commissioner submitted that the matter could return to Court for further orders. All this suggests that an order for a Court-appointed expert may delay the proceedings.
38 Fifth, the substantive proceeding arises from the Commissioner's amended assessment of Hilton's tax liability. One assumes the Commissioner considered he had a basis and reasons for issuing the assessment it did. The Commissioner had relied on an expert whom he says can no longer be relied on because he was used in the mediation process. In the current circumstances, the Commissioner submits he does not seek a joint expert to assist him, but rather to assist the Court, as without which the position would likely be that he would be confined to cross-examination of Hilton's expert and any submission that Hilton had failed to discharge its onus. The Commissioner accepted that that latter approach is one commonly taken by the Commissioner. Apart from submitting that a joint expert would assist the Court and therefore be in the interests of justice, the Commissioner did not articulate why this situation required an approach different to that commonly taken, and calls for a joint expert at this stage. It was suggested that ordering a joint expert is fairer to the parties because both parties can cross-examine the witness. Hilton does not accept that. Nor could it be said it is fairer to Hilton to be deprived of reliance on the expert it has retained when attempting to discharge the onus on it.
39 In any event, if a joint expert were to be ordered, and the expert expresses an opinion consistent with that sought by Hilton, the Commissioner, as conceded during the hearing, would be left to cross-examine and argue that Hilton had not discharged its onus. That would result in a situation the same as now faced by the Commissioner. By contrast, if the joint expert were to express a position consistent with that sought by the Commissioner, Hilton could cross-examine the witness, but would still be left with a lacuna in their case (on which it bears the onus); an issue not faced by the Commissioner.
40 Sixth, the Commissioner's proposed orders require one party to provide the other with a list of three potential experts from which the joint expert will ultimately be chosen. The Commissioner suggests that in relation to nominating three experts, it would use names on the list of persons already contacted where there is described a commercial conflict. It was submitted this was appropriate as such a person is likely to accept a court appointment as they would not be seen as acting "against" Hilton. There is no real basis to suggest that the persons who the Commissioner have already approached would be in any different position if I were to make the order sought. None have suggested as much. The correspondence annexed to the affidavit evidencing some of the communications does not suggest that conclusion. There appears to be an amount of surmise in the submission, including as to the basis of the conflict these persons have.
41 Seventh, once Hilton has filed its evidence, the Commissioner can consider that evidence and then act accordingly, depending on its content. This may involve continuing to seek to obtain an expert report, cross-examining the expert witness on the report relied on by Hilton and/or making submissions directed to whether the Court should accept the evidence and, if so, the weight to be attached. As noted above, the latter two steps were accepted by the Commissioner to be a common approach. In making that observation, I accept the efforts that the Commissioner has gone to since late 2021 to retain a legal expert. That said, one expert was found and used by the Commissioner (albeit now it is said that he cannot be relied on), and a commercial expert has been retained. I note that the use made of the legal expert it had retained in mediation, which prevents his use in these proceedings, was a matter for the Commissioner.
42 At this stage, the Commissioner has no knowledge of the content of Hilton's expert evidence. The Commissioner understands that a commercial and legal expert is to be relied upon. It is in that context that he has sought to do the same. Any expert relied on must ascribe to this Court's code of conduct. I have approached the application on that basis.
43 Finally, I note that it would be an unusual circumstance for each party to rely on the separate commercial experts they have each retained, but at the same time be required to rely on a joint legal expert appointed by this Court.
44 Applying the relevant principles to the very particular circumstances of this case, I am not persuaded that the order sought should be made.