Where an offender's need to serve a sentence in protection custody has already been taken into account in discounting the head sentence (as part of a discount for assistance to authorities), the same circumstance cannot be relied upon again as a special circumstance to further reduce the non-parole period, as this amounts to double-counting. A total discount of fifty percent for pleas of guilty and substantial assistance to authorities (including undertaking to give evidence against co-offenders who are family members) is not outside the range of proper sentencing discretion for serious drug supply offences where the offender played a comparatively minor role.
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