East Australian Pipeline Pty Limited v Australian Competition and Consumer Commission & Anor

The High Court of Australia considered a dispute between East Australian Pipeline Pty Limited (EAPL) and the Australian Competition and Consumer Commission (ACCC) and the Australian Energy Regulator (AER). The core of the dispute concerned the interpretation and application of the National Gas Law (NGL) and the National Gas Regulations (NGR) in relation to the regulation of pipeline services provided by EAPL. Specifically, the proceedings involved challenges to decisions made by the AER regarding the regulation of EAPL's pipeline services.

The central legal issues before the High Court were: (1) whether the AER had correctly determined the reference tariffs for EAPL's pipeline services under the NGL and NGR; (2) whether the AER's decision was affected by an error of law, particularly concerning the interpretation of provisions relating to the determination of revenue caps and the consideration of EAPL's proposed pricing; and (3) the proper application of the principles of administrative law in reviewing the AER's regulatory decision. The Court was required to consider the statutory framework governing gas pipeline regulation and the scope of judicial review of decisions made by regulatory bodies.

The High Court's reasoning focused on the statutory interpretation of the NGL and NGR, particularly provisions relating to the economic regulation of covered pipeline services. The Court analysed the AER's obligations and discretions in setting reference tariffs, emphasising the importance of the regulatory objectives set out in the legislation. The judges considered the evidence and submissions regarding the AER's methodology and the extent to which it had complied with the legislative requirements. The Court applied established principles of administrative law concerning the review of regulatory decisions, including the grounds for intervention where a decision is affected by an error of law.

The High Court allowed the appeal in part, finding that the AER had made an error of law in its determination of the reference tariffs. The Court set aside the AER's decision and remitted the matter back to the AER for redetermination in accordance with the reasons of the High Court.