In sentencing for terrorism offences, the primary considerations are protection of the community, punishment, denunciation, and both specific and general deterrence; subjective circumstances including youth and rehabilitation are given less weight. The weight of youth as a mitigating factor is considerably diminished in terrorist cases where the offender participates in, plans or carries out actions of extreme violence, particularly where there is no causal link between the offender's age and the criminal conduct. Section 19AG of the Crimes Act 1914 (Cth) is constitutionally valid and prescribes a minimum non-parole period of three-quarters of the head sentence for terrorism offences. The existence of a continuing detention scheme for high-risk terrorist offenders is not to be taken into account in sentencing.
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