SkyCity Adelaide Pty Ltd v Treasurer of South Australia & Anor

The High Court of Australia considered a dispute between SkyCity Adelaide Pty Ltd and the Treasurer of South Australia, along with the Commissioner of State Taxation. The core of the disagreement concerned the validity of a notice issued by the Treasurer under section 112 of the *Stamp Duties Act 1923* (SA) (the Act), which purported to assess stamp duty on a financial accommodation arrangement between SkyCity and a related entity. SkyCity argued that the notice was invalid because it was issued outside the time limit prescribed by section 112(2) of the Act.

The central legal question before the High Court was whether the Treasurer's notice, issued more than five years after the relevant transaction, was a valid assessment of stamp duty under the *Stamp Duties Act 1923* (SA). This required the Court to interpret the meaning and application of section 112(2) of the Act, specifically whether the time limit for issuing such a notice was a jurisdictional error that rendered the assessment void, or merely an irregularity that did not invalidate the assessment.

The High Court, by majority, held that the time limit in section 112(2) of the Act was not a condition precedent to the Treasurer's power to assess stamp duty. The Court reasoned that the provision was intended to provide a period of certainty for taxpayers and the revenue authority, but its expiry did not extinguish the Treasurer's underlying power to assess duty. Instead, the Court found that the time limit operated as a procedural requirement, and a failure to comply with it did not render the assessment void *ab initio*. The Court applied principles of statutory interpretation, emphasizing that a provision will not be construed as jurisdictional unless the legislature has clearly indicated that its breach should have that effect.

The appeal was allowed, and the notice of assessment issued by the Treasurer was declared to be valid.