Satisfaction of the s 9A requirement that employment be a 'substantial contributing factor' to a psychological injury does not preclude the operation of s 11A of the Workers Compensation Act 1987 (NSW). It is perfectly possible for employment to be a substantial contributing factor to injury and yet for reasonable disciplinary action to be the sole or predominant cause of the injury, thereby barring compensation under s 11A. A decision-maker who treats satisfaction of s 9A as disposing of the s 11A question commits an error of law.
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