Commonwealth of Australia v Hooper

The applicant, the Commonwealth of Australia, sought special leave to appeal to the High Court of Australia against a decision concerning an agreement with the respondent, John Edwin Hooper, representing the Australian Gas Light Company (AGL). The dispute centred on clause 7.8 of a tripartite agreement known as the "1985 Heads of Agreement," entered into by AGL, the Pipeline Authority, and the Commonwealth. This clause granted AGL a first right of refusal to acquire the pipeline, or any interest in it, should the Pipeline Authority decide to sell. The pipeline itself was vested in the Pipeline Authority, not the Commonwealth.

The central legal issue before the High Court was whether the Commonwealth possessed the power to enter into a contract that would bind Parliament, such that a breach of contract would occur if Parliament subsequently legislated in a manner inconsistent with the contractual terms. The applicant argued that this was an important point of law, inevitably involved in the case, particularly as the declaration in question related to a proposal intended to be effected by legislation.

The applicant contended that the agreement, specifically clause 7.8, was made in contemplation of a legislative process for the privatisation of the pipeline. The Commonwealth invited proposals for the purchase of the pipeline, which was the property of the Pipeline Authority. The applicant's submission was that the Commonwealth's contractual commitment in the Heads of Agreement effectively sought to constrain future legislative action by Parliament, raising fundamental questions about the separation of powers and parliamentary sovereignty.