Indeed both parties seem to agree on this latter point (ii) (Red, 97M-O).
19 In general terms, the Deputy President accepted these submissions, revoking the Arbitrator's decision and making the following orders (Red, 59):
(a) The decision of the Arbitrator as to total and partial incapacity for work is revoked and the following decision is substituted.
(b) The Appellant is to pay to the Respondent Worker, weekly compensation at the rates to be determined according to law, for a period of total incapacity from 11 October, 2001 to 11 February 2002, and thereafter, for periods of total or partial incapacity on presentation of appropriate medical certificates, up to 15 October 2002.
(c) The purported decision of the Arbitrator concerning the calculation and determination of the amounts of compensation payable to the Respondent Worker is not a valid decision and the matter is referred to the Registrar for return to the Arbitrator, for a decision to be made by her, according to law.
(d) No order is made as to costs."
20 The combination of substituted orders and 'remittal' to the Arbitrator stems from the different treatment by Byron DP of the two broad complaints identified above.
21 There is little difficulty about issue (i), regarding which the determination was revoked and new orders substituted. The Deputy President found that the Arbitrator was justified in finding that there were several periods of total and partial incapacity, but had erred in the minutiae of the dates concerned. In the circumstances Byron DP revoked the Arbitrator's decision and substituted the one set out in (b) above for the following reasons. The first error made by the Arbitrator was that the specified first period of total incapacity could on the evidence be no more than from 11 October 2001 to 11 February 2002, rather than from 11 October 2001 to 23 February 2002 (Red, 99K-L). The Arbitrator gave no reasons for determining that Ms Trevarrow was unfit for work until 23 March 2002, and it is not possible to ascertain the basis upon which that date was established on inspection of the evidence before the Arbitrator, the transcript and the file (Red, 94I-J). Since the last precise date which could be specified for total incapacity was 11 February 2002, that date was the significant date and should have been reflected in the Certificate of Determination. (Red, 94Q). The second error was that the Arbitrator (though correct in determining that payment of compensation beyond 11 February 2002 should be made on presentation of medical certificates) failed to "close" the period of payment by specifying 15 October 2002 as the last day for which payment was payable (as in Ms Trevarrow's claim form) (Red, 99P-T).
22 Issue (ii), which resulted in the 'remittal' (more properly, the referral to the Registrar for re-listing before an Arbitrator), was more complicated, and depended on the view expressed by Byron DP that no valid decision had been made by the Arbitrator calculating the rates of weekly compensation for which Chubb was liable. The Deputy President considered that the failure of the Arbitrator to make the appropriate statutory calculations constituted a jurisdictional error, rendering the purported determination nugatory under the principle laid down in Minister for Immigration and Multicultural Affairs v Bhardwaj (2002) 209 CLR 597 (Red, 97W-98O). The jurisdictional error identified was the failure to find a jurisdictional fact, namely making the necessary statutory calculations referred to above. That finding of fact was considered to be a necessary pre-condition of the making of an order to pay weekly compensation.
23 The Deputy President considered and rejected the submission that he should make the determination of appropriate weekly payments with the necessary calculations and reasons to support which the Arbitrator should have made. His reasoning that jurisdictional error had occurred appears to have been for him determinative of the matter, foreclosing the question of whether he should make a determination of the weekly compensation rates in the Arbitrator's stead. Since the Arbitrator had not made a decision with respect to the amount of weekly compensation payments for which Chubb was liable, there was no decision for the Deputy President to either confirm or revoke and substitute under s352(7).
24 Since no valid decision had been made by the Arbitrator (and thus it could not be replaced or varied by the Deputy President), and as it was still necessary for a decision to be made to dispose of the matter, the Deputy President seems to have felt the only option was to refer the matter back to a Registrar for re-listing before the Arbitrator. In the circumstances, Byron DP obviously felt it was appropriate for the original Arbitrator to make that decision. However, as mentioned previously, the appellate tribunal of the Commission had no power under s352(7) WIM (as it then stood) to remit the matter to the Arbitrator, having power only to confirm the determination or revoke it and make a new decision in its place. For this reason, Byron DP referred the matter to the Registrar to be put before an Arbitrator and noted his view that "it is appropriate in this case for the matter to be allocated to the Arbitrator who purported to make the original decision" (Red, 98O-S). That, at least, is how I interpret the reasoning of Byron DP at Red, 97M-98R.