State Transit Authority of NSW v Chemler

The appeal concerned a determination by ADP Handley regarding a workers compensation claim brought by Mr Chemler against the State Transit Authority of NSW (STA). Mr Chemler, a boilermaker and welder, alleged he suffered a psychological injury due to harassment and racial vilification at the STA workplace. The STA contended that any such injury was wholly or predominantly caused by reasonable disciplinary action it had taken against Mr Chemler, relying on section 11A of the *Workers Compensation Act*.

The primary legal issue before the Court of Appeal was whether ADP Handley had erred in law concerning the application of section 11A of the *Workers Compensation Act*. Specifically, the STA argued that ADP Handley had misunderstood the Arbitrator's decision, incorrectly concluding that the Arbitrator had failed to address section 11A when, in fact, the Arbitrator had considered it but erroneously believed compliance with section 9A overrode its application. The STA maintained that ADP Handley's subsequent reasoning, based on this misunderstanding, led to legal error.

The Court of Appeal found that ADP Handley had indeed fallen into legal error by misapprehending the Arbitrator's approach to section 11A. The Arbitrator had addressed the section but incorrectly concluded that compliance with section 9A superseded its application. ADP Handley's subsequent reasoning, which assumed the Arbitrator had not addressed section 11A at all, was flawed. Consequently, the Court allowed the appeal, set aside the decision of ADP Handley, and remitted the matter to the Workers Compensation Commission for a rehearing.