25As earlier stated, underpinning the criticism of the sentence imposed is the principle of totality, as it applies to the task of imposing a sentence at a time when an offender is already in custody.
26The more orthodox approach when sentencing an offender, who is already serving a sentence, is for the sentencing judge to impose a sentence that would have been likely to have been imposed if the offender had committed all of the offences in one jurisdiction and had been sentenced at one time. The requirement remains that each individual sentence reflects the criminality of the offence to which it relates and the overall sentence reflects the total criminality of the crimes committed: Pearce v R [1998] HCA 57; (1998) 194 CLR 610.
27The charging of two or more offences that involve common elements requires the court to ensure that there is no double punishment for the one offending course of conduct: Pearce at [40]. A commonsense approach to the issue must be taken: Pearce at [42].
28Only after fixing an appropriate sentence for each offence, should a sentencing judge consider questions of accumulation and concurrency and questions of totality: Pearce at [45]. The foregoing principles apply even where there is a significant delay between the different sentencing exercises and even where there are different jurisdictions or judges involved: Mill v The Queen (1988) 166 CLR 59.
29The sentencing discretion must be exercised judicially and cannot be calculated arithmetically: Pearce at [46]; Markarian v The Queen [2005] HCA 25; (2005) 228 CLR 357. There is, therefore, no single correct answer. It is always the task of the sentencing judge to apply the general sentencing principles to fix an appropriate head sentence and an appropriate period during which the offender is eligible for parole, bearing in mind the often disparate goals of punishment, protection of society, deterrence of the offender and others who might be tempted to offend, retribution and rehabilitation: s 3A of the Crimes (Sentencing Procedure) Act and Veen v R (No 2) (1988) 164 CLR 465 at 476.
30Further, it is a matter within the discretion of the sentencing judge whether the judge considers there are special circumstances that warrant the fixing of a greater proportion of the sentence as the period for which an offender is eligible for parole and the proportion that the legislature has prescribed: s 44 of the Crimes (Sentencing Procedure) Act.
31The prescription in s 44 of the Crimes (Sentencing Procedure) Act relates to individual sentences and does not preclude the fixing of a ratio greater than 3:1: see Musgrove and Barrett.
32Accumulation of sentences has an arithmetic effect on the proportion. Where, as here, a sentencing judge has, by fixing a sentence that reflects the 3:1 ratio, implemented an overall sentence that reflects a greater than 3:1 ratio without otherwise indicating such an intention, the Court will be more astute in assuming that the issue has been overlooked. In my view, in this case, it has been overlooked or alternatively, the sentencing judge has not applied the totality principle.
33The offence is serious. The sentence needs to reflect that seriousness. Yet no complaint is made by the Crown that the head sentence is inadequate. In my view, the head sentence is adequate in all of the circumstances, but the length of potential parole is inadequate to enable, subject to the satisfaction of the NSW State Parole Authority, an appropriate period for rehabilitation and assimilation into the community.
34I do not propose to alter the head sentence, and I take the view that the overall potential parole period ought to reflect the ratio that the sentencing judge thought was appropriate, namely, 3:1. The sentencing judge for the earlier offence fixed a lower ratio, namely, 1:1.
35However, I do not consider it appropriate to fix a sentence by reference to a number of days. It is far better to round any sentence that may be imposed. Other than rounding the days, I would not interfere with the head sentence imposed and would implement a ratio for the non-parole period of 3:1.
36For the foregoing reasons, I propose that the Court make the following orders:
(1) Leave to appeal granted;
(2) The sentence imposed by the District Court on Richard Connelly on 16 March 2011 be quashed and, in lieu thereof, he be sentenced to a non-parole period of one year and nine months commencing 16 December 2010 and concluding 15 September 2012 with a remainder of term of 14 months, concluding 15 November 2013.