Castlemaine Tooheys Limited & Ors v The State of South Australia

Castlemaine Tooheys Limited and others (the plaintiffs) brought proceedings against the State of South Australia (the defendant) in the High Court of Australia. The dispute concerned the validity of South Australian legislation mandating the compulsory redemption of beer bottles. The plaintiffs contended that this legislation contravened section 92 of the Australian Constitution, which guarantees freedom of interstate trade, commerce, and intercourse.

The central legal issue before the Court was the means by which the protectionist character of legislation, relevant to a section 92 challenge, could be proven. Specifically, the parties sought a determination on the types of evidence that could be considered in establishing such a character. This included whether the Court should confine its examination to the legislation itself, consider objective background facts such as market share and the effect of the legislation, or also take into account subjective materials like second reading speeches, explanatory memoranda, and the views of legislators.

The parties proposed that the Full Court determine the matter on a stated case. Their primary contention was that on agreed objective facts, the legislation possessed a protectionist character and thus contravened section 92. Alternatively, they sought a ruling that even on these objective facts, the plaintiff would not succeed, and that subjective or quasi-subjective evidence would not be considered, thereby avoiding a full trial. The third possibility was that the Court might find the objective facts insufficient but acknowledge that subjective or quasi-subjective evidence, if proven, could lead to a different outcome, necessitating a remission of the case.