South Australian Harbors Board v South Australian Gas Co

The South Australian Harbors Board (the Board) appealed to the High Court of Australia from a decision of the Supreme Court of South Australia concerning a dispute with the South Australian Gas Company (the Gas Company). The core of the dispute involved the amount the Board was entitled to charge the Gas Company for the use of the Board's coal-handling plant at Osborne, as well as damages claimed by the Gas Company for the Board's delay in completing the plant.

The legal issues before the High Court included whether a regulation fixing charges for the use of the Board's plant, once revoked, continued to have effect for the period it was in force, and if not, what legal basis existed for the Board to claim remuneration for its services. The Court also had to determine the reasonableness of the charges claimed by the Board, particularly in light of a lease agreement that stipulated the Board would erect the plant and the Gas Company would have the right to use it, without a pre-agreed price.

The Court considered the effect of the revocation of a regulation, holding that it had the same effect as the repeal of a statute at common law, meaning it did not preserve rights or liabilities that had not already accrued and been concluded. Consequently, the Board could not rely on the revoked regulation to justify its charges. The Court further held that a subsequent resolution by the Board to adopt the same charges was not sufficient to impose liability independently of contract or regulation. Instead, the Board was entitled to recover a reasonable charge for the services rendered, a *quantum meruit*. The Court then engaged in a detailed analysis of the costs and revenues associated with the plant to determine what constituted a fair and reasonable charge, considering factors such as capital expenditure, operational costs, and the overall purpose and design of the undertaking.

The High Court allowed the appeal in part. While agreeing with the Supreme Court that the revoked regulation did not govern the charges, the High Court differed on the calculation of a reasonable charge. The Court determined that the Board was entitled to recover a charge of 3s. per ton, plus an additional 1d. per ton for 'tween-deck vessels, for the use of its plant. This led to a revised judgment in favour of the Board for £3,938 10s. 1d.