John Holland Pty Ltd v Victorian Workcover Authority

The High Court of Australia considered a dispute between John Holland Pty Ltd (the plaintiff) and the Victorian Workcover Authority (the defendant) concerning the application of Commonwealth and Victorian occupational health and safety legislation. The plaintiff had been charged with offences under the *Occupational Health and Safety Act 2004* (Vic) for conduct that occurred before it became a "non-Commonwealth licensee" under the *Occupational Health and Safety Act 1991* (Cth). The central question was whether the plaintiff remained liable for these prior offences under the Victorian Act, despite its subsequent status under the Commonwealth Act, and whether this liability was invalidated by section 109 of the Constitution due to inconsistency.

The legal issues before the Court were twofold. Firstly, whether the plaintiff, by virtue of being a "non-Commonwealth licensee" for the purposes of the Commonwealth Act, was still liable to conviction under the Victorian Act for offences allegedly committed before it attained that status. Secondly, if the answer to the first question was yes, whether the provisions of the Victorian Act authorising inspectors to bring proceedings for such offences were inconsistent with the Commonwealth Act and therefore invalid under section 109 of the Constitution.

The Court reasoned that section 4 of the Commonwealth Act, which defined the scope of its application, did not operate directly on State law but rather indicated an intention to cover a particular field. This intention, when supported by the substantive provisions of the Commonwealth Act, informs the operation of section 109 of the Constitution. The Court distinguished this case from situations where a Commonwealth law might impermissibly attempt to exclude State legislative power without enacting its own provisions. It held that the Commonwealth Act, as enacted, operated prospectively and did not invalidate State laws that imposed liability for past conduct, even if the employer subsequently fell within the definition of a "non-Commonwealth licensee".

The Court ordered that the questions reserved in the amended stated case be answered. It held that the plaintiff was liable to conviction for offences committed before becoming a "non-Commonwealth licensee" and that the relevant provisions of the Victorian Act were not invalid by reason of section 109 of the Constitution. Consequently, further questions regarding the consequences of invalidity did not arise, and the plaintiff was ordered to pay the costs of the stated case.