Department of Education and Training v Sinclair

The appeal concerned a claim for workers' compensation by an employee of the Department of Education and Training who sustained a psychological injury. The injury allegedly arose from disciplinary proceedings initiated by the employer. The primary legal question was whether the employer's actions, specifically those relating to discipline, were "reasonable action taken with respect to discipline" within the meaning of section 11A of the *Workers Compensation Act 1987* (NSW), and if so, whether this reasonable action was the "wholly or predominantly" cause of the employee's injury. The matter came before the Supreme Court of New South Wales on appeal from a decision of Sheahan J.

The court was required to determine whether the primary judge had erred in law in their application of section 11A of the *Workers Compensation Act 1987*. Specifically, the court considered whether the primary judge had failed to properly assess whether the employee's psychological injury was wholly or predominantly caused by the employer's reasonable action with respect to discipline, as contemplated by section 11A. The court also considered the interaction between section 11A and section 9A of the Act, which deals with the substantial cause of the injury. Furthermore, the court had to decide whether the matter should be remitted to the Workers Compensation Commission for redetermination, pursuant to section 353 of the *Workplace Injury Management and Workers Compensation Act 1998* (NSW).

The court reasoned that the primary judge had made an error of law by failing to adequately consider the threshold question of whether the employer's actions constituted "reasonable action with respect to discipline" under section 11A. The court clarified that section 11A operates as a defence to a claim where the injury is wholly or predominantly caused by such reasonable action. The court found that the primary judge had not properly engaged with this aspect of the legislation, nor had they sufficiently considered the interplay between the "reasonable action" defence and the general requirement under section 9A that employment be the substantial cause of the injury. Consequently, the court concluded that the proceedings should be remitted to the Commission for a redetermination of the claim, applying the correct legal principles. The court ordered that the orders of Sheahan J be set aside and the proceedings remitted to the Commission for determination in accordance with the court's reasons. The respondent was ordered to pay half the appellant's costs of the appeal.