Non-compliance by the Registrar of Motor Vehicles with the obligation to act 'with all convenient speed' under s 27(3) of the Acts Interpretation Act 1915 (SA) does not invalidate disqualification notices issued under the Motor Vehicles Act 1959 (SA). More broadly, temporal obligations sourced in general interpretation legislation, expressed in indeterminate terms, are less likely to be construed as conditions of validity than specific time limits enacted within the substantive statute itself. The indeterminacy of a temporal obligation and its location in a general enactment are significant contra-indicators of invalidity.
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