Union Steamship Company of Australia v King

The applicant, Union Steamship Company of Australia, sought special leave to appeal from a decision of the New South Wales Court of Appeal. The dispute concerned the validity of claims for workers' compensation made by seamen employed on vessels engaged in interstate trade. The primary judge in the Workers' Compensation Commission had previously held that the Commonwealth's *Seamen's Compensation Act 1911* covered the field, precluding claims under New South Wales legislation. However, the decision under appeal had departed from this precedent.

The legal issues before the High Court revolved around the extent to which the Commonwealth *Seamen's Compensation Act* occupied the legislative field concerning workers' compensation for seamen. Specifically, the court was required to determine whether the Commonwealth Act covered the field, thereby invalidating provisions of the New South Wales *Workers' Compensation Act*, including section 46 and, as an alternative basis adopted by the respondent, section 7 of the State Act. The applicant argued that the Commonwealth legislation, particularly as it related to employment covered by section 4 of the *Seamen's Compensation Act*, occupied the entire field of workers' compensation for such seamen.

The High Court considered the argument that the *Seamen's Compensation Act* covered the legislative field. The applicant contended that the Commonwealth Act was intended to be exhaustive in relation to the specified types of seaman employment, including those on ships engaged in interstate trade. This proposition was central to the applicant's submission that the New South Wales *Workers' Compensation Act*, including its provisions like section 46 and section 7, could not validly apply to these seamen. The court was therefore tasked with assessing whether the Commonwealth legislation's scope was such that it excluded any operation of the State Act in this context, a question that had been debated in earlier New South Wales decisions.