The parity principle applies to the comparison of discounts given for cooperation under s 13A of the Penalties and Sentences Act 1992 (Qld) between co-offenders. When more than one co-offender has given s 13A cooperation, the court must consider the extent and relative value of that cooperation, and an extremely marked disparity in the discounts given may give rise to an objectively justifiable sense of grievance even where the cooperation is of different value.
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