Wanganui-Rangitikei Electric Power Board v Australian Mutual Provident Society

The case involved the Wanganui-Rangitikei Electric Power Board, a New Zealand local authority, and the Australian Mutual Provident Society, a New South Wales corporation. The dispute arose when the Board sought to reduce interest payments on loans it had obtained from the Society between 1924 and 1926. These loans were secured by debentures made payable in Sydney, New South Wales, although the borrower and the security were located in New Zealand. The Board contended that the New South Wales Interest Reduction Act 1931 applied to these loans, entitling it to reduce the interest payable. The matter was heard on appeal by the High Court of Australia from the Supreme Court of New South Wales.

The central legal issues before the High Court were whether the New South Wales Interest Reduction Act 1931 applied to the obligation to pay interest under the loan agreements and debentures, and consequently, whether the Board was entitled to reduce the interest payments. This required the Court to determine the proper law of the contract, specifically the obligation to pay interest, and to consider the territorial scope of the New South Wales legislation in light of private international law principles.

The High Court, affirming the decision of the Supreme Court of New South Wales, held that the proper law of the obligation to pay interest was the law of New Zealand. The Court reasoned that despite the debentures being payable in New South Wales, the loan was raised by a New Zealand public body under New Zealand statutes, secured upon New Zealand property, and enforceable in New Zealand courts. Therefore, the obligation to pay interest was not an obligation "in and of New South Wales" within the meaning of section 17 of the Interpretation Act 1897 (N.S.W.). Consequently, the New South Wales Interest Reduction Act 1931 did not apply to these obligations.

The appeal by the Wanganui-Rangitikei Electric Power Board was dismissed.