Police v Ghuede

The appeal by the police against the acquittal of the respondent on the basis of mental incompetence in a refusal to submit to an alcotest was heard in the Supreme Court of South Australia. The respondent, who was charged with multiple offences including speeding and driving without due care, was found to be not guilty of the charge related to refusing to submit to an alcotest due to mental incompetence. The police contested this acquittal, arguing that the mental incompetence provisions of the Criminal Law Consolidation Act 1935 should not apply to the offence under section 47E of the Road Traffic Act 1961, and that the respondent should not be able to raise a defence of mental incompetence.

The legal issue before the court was whether the Parliament intended to exclude the application of Part 8A of the Criminal Law Consolidation Act 1935 when it enacted section 47E of the Road Traffic Act 1961, and if so, whether this intention could be inferred from the language or content of section 47E. The police argued that the language of section 47E, which outlines specific conditions under which a refusal to submit to an alcotest can be excused, effectively excluded the application of the mental incompetence provisions. However, the court held that the Parliament did not intend to exclude the application of Part 8A and that the mental incompetence defence was available in the context of a charge under section 47E.

In reaching its decision, the court considered the broader policy objectives of the Road Traffic Act, which aim to control risks to public safety presented by drug-affected drivers, and noted that these policy reasons applied equally to all offences under the Act, including the offence of refusing to submit to an alcotest. The court found that there was no valid reason to deny the respondent the benefit of a mental incompetence defence when such a defence was available for other related offences. Consequently, the appeal was dismissed, and the magistrate's decision to acquit the respondent on the basis of mental incompetence was upheld.