Under s 89 of the Sentencing Act 1995 (WA), a court is required to make a parole eligibility order unless the discretion to decline is triggered by the presence of at least two of the four factors in s 89(4); once triggered, the discretion must be exercised without predisposition. A plea of guilty need not invariably result in a sentence reduction, but will do so in all but the most exceptional cases, because even an inevitable plea evidences willingness to facilitate the course of justice. The transitional provisions require the court first to determine the appropriate sentence and then reduce by one-third, not to reduce the maximum and then sentence within the reduced range. The 'seriousness' of an offence under s 89(4)(a) must be assessed in the context of offences justifying imprisonment, not offences generally.
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