Mr. Jackson draws the attention of the Court to three matters of difference between the law of Queensland and the law of New South Wales which he claims could be material in the present case. First, s. 5 of the Common Law Practice Act 1867-1981 Q. requires an award of damages in the form of lump sum compensation for future loss, whether referable to earning capacity or future expenditure, to be the present value of that sum calculated in accordance with actuarial tables at a discount rate of 5 per cent or at such other discount rate as at the time of the award may have been fixed by the Governor in Council. The Governor in Council has made no fixation to date. In similar circumstances, an award determined according to the law of New South Wales would require the application of a discount rate of 3 per cent: Todorovic v. Waller [10] . Secondly, regs 10 and 11 of The Motor Vehicles Insurance Regulations of 1968 (Q.) as amended, provide that the insurer of a vehicle in respect of which a proceeding is instituted is entitled to be joined in the proceeding, and thereafter to conduct the proceedings on behalf of the person against whom the claim is made. Thirdly, pursuant to s. 4C of the Motor Vehicles Insurance Act 1936-1979 Q., there may be circumstances in which, if an injured person has persistently and wilfully refused to comply with an order of the court to submit himself to a personal medical examination, the court may enter judgment against the plaintiff on such terms as it deems fit. It is unnecessary to define precisely, in these second and third respects, the nature of the distinctions which are to be drawn with the law of New South Wales nor the extent of the materiality if any which they may import in the present case. The different discount rates which might apply in the assessment of damages according to whether the remitter is to Queensland or to New South Wales is sufficient to identify the problem. It is a distinction which goes directly to the heart of the matter, and renders the decision of this Court on a remitter application a significant factor in the ultimate result of the action. Assuming that the Queensland discount rate remains unchanged, a decision in favour of New South Wales would have the effect of conferring a fortuitous advantage on the plaintiff and a corresponding disadvantage on the defendant, as compared with the rights of the parties if the case were determined in accordance with the law of the State where the cause of action arose. Is there any principle by which such a result could be justified? It may be helpful to consider what criteria, if any, are available to guide or control the exercise of the discretion.