Non-parole periods are commonly fixed at between 50 and 75 per cent of the head sentence, with the sentencing judge's assessment of rehabilitation prospects being the most influential factor. For young adult offenders whose offending history is substantially juvenile in character, a non-parole period at the higher end of the range (75%) may be manifestly excessive even where the offending history is extensive, because the special considerations applicable to juvenile offenders do not disappear upon turning 18. A proportion of approximately 60% may be more appropriate where the offender's youth and rehabilitation prospects warrant it.
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