The majority upheld Re Monger; Ex parte TNT Australia Pty Ltd, confirming that the time limits in s 93E(5) and (6) of the Workers' Compensation and Rehabilitation Act 1981 (WA) are mandatory and non-compliance is fatal to an election to retain common law damages rights. However, the minority (Malcolm CJ and Heenan J) provided a detailed analysis concluding these time limits are procedural rather than jurisdictional and capable of waiver or estoppel, which may be influential in future reconsideration. The question whether an employer's failure to raise a time limit defence in review proceedings constitutes waiver remains unresolved by the majority.
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