The concept of a 'usual non-parole period' of between 60% and 75% of head sentence ceases to be of much guidance where the head sentence is in the order of 10 years' imprisonment or more; for such sentences, higher ratios are to be expected. Sentencing judges should avoid saying they propose to give a 'shorter than usual non-parole period' and instead say they propose to give a shorter non-parole period than they would otherwise have imposed, to avoid creating false expectations and misconceived appeals.
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