Australian Stock Exchange Limited v Hudson Securities Pty Limited

Australian Stock Exchange Limited brought an action against Hudson Securities Pty Limited concerning the interpretation and application of Rule 13.1(1) of the ASX Business Rules. The dispute centred around the requirement for legal advisers and others from a Participating Organisation to be present during investigations conducted by the ASX. Hudson Securities argued that the presence of such personnel was an implied requirement of procedural fairness, while the ASX contended that the rule did not necessitate such presence and that it could prejudice the integrity of the investigation.

The court examined whether the presence of a legal adviser and others from a Participating Organisation during an ASX investigation was an implied requirement of procedural fairness under Rule 13.1(1). It was necessary to consider how the rules of procedural fairness and Business Rule 13.1(1) could accommodate the requirement that such presence not prejudice the integrity of the investigation. The court also needed to determine the meaning of "integrity of the investigation" in this context, whether an implied term to that effect was necessary and justified, and the public purpose of the ASX's business rules, particularly the investigation regime in Rule 13.1(1). Additionally, the court considered the ASX's power to impose confidentiality undertakings as a condition of presence to avoid prejudice to the investigation's integrity and the effect of a senior executive's presence on inhibiting interviewee answers. Finally, the scope of Rule 13.1(1) was examined in relation to a potential shadow director who was the managing director of the parent of a Participating Organisation.

The court found that the presence of a legal adviser and others from a Participating Organisation was not an implied requirement of procedural fairness under Rule 13.1(1). It held that the rules of procedural fairness and Business Rule 13.1(1) could accommodate the requirement that such presence not prejudice the integrity of the investigation. The court clarified the meaning of "integrity of the investigation" and concluded that an implied term to that effect was necessary and justified, given the public purpose of the ASX's business rules and the investigation regime in Rule 13.1(1). The court also affirmed the ASX's power to impose confidentiality undertakings as a condition of presence to avoid prejudice to the investigation's integrity and found that the presence of a senior executive could inhibit interviewee answers. Finally, the court determined that Rule 13.1(1) did not extend to a potential shadow director who was the managing director of the parent of a Participating Organisation.

The court ordered that Hudson Securities Pty Limited pay the costs of the Australian Stock Exchange Limited's proceedings.