Boan v Commissioner of Stamps (WA)

The case of *Boan v Commissioner of Stamps (WA)* concerned an appeal to the High Court of Australia from the Supreme Court of Western Australia regarding the valuation of shares in a proprietary company for succession duty purposes. The dispute arose between the Commissioner of Stamps and the executors of the estate of Henry Boan, who owned preference and ordinary shares in Boans Ltd. The core of the disagreement lay in the method prescribed by the *Administration Act 1903-1941* (WA) for valuing such shares, particularly in light of sections 110 and 112 of the Act.

The legal issues before the High Court were primarily twofold: first, how to correctly interpret and apply section 110 of the *Administration Act*, which outlines the method for valuing a deceased partner's share in a partnership, and second, how section 112 of the same Act, which mandates that shares in a proprietary company be valued as if the company were a partnership, interacts with section 110. Specifically, the court had to determine whether the "fractional share" and "whole number of shares" referred to in section 110 should be calculated based on the number of shares held irrespective of class, or if distinctions between share classes, such as preference and ordinary shares, should be considered.

The High Court, by a majority of Rich and Dixon JJ. (with Latham C.J. dissenting), held that section 110 of the *Administration Act* prescribed a specific, artificial method for valuing a partner's interest. This method required calculating the deceased partner's share as a proportion of the partnership's "total capital," defined as assets less liabilities. Section 112 extended this method to proprietary companies, effectively transforming interests in the company's assets into corresponding interests in the surplus assets of a notional partnership. The majority reasoned that the deceased's interest should be ascertained by first accounting for the proportion of capital represented by preference shares, and then calculating the proportion of remaining surplus assets attributable to the ordinary shares based on the deceased's holding. This approach treated the company's capital structure, including different share classes, as a basis for determining the fractional interest in the surplus assets.

The High Court allowed the appeal, overturning the decision of the Supreme Court of Western Australia. The majority found that the Supreme Court had erred in its interpretation of the relevant sections. The court ordered that the valuation of the deceased's shares should be conducted according to the principles articulated by the majority, which involved a specific calculation based on the proportion of capital represented by preference shares and the proportion of surplus assets attributable to ordinary shares.