Section 16 of the Workers Compensation Act 1987 applies whenever an injury consists in the aggravation of a disease, including where the aggravation is caused by a single incident ('frank injury'), not only where it arises from the long-term nature and conditions of employment. When s 16 applies, it operates as a code excluding s 22 apportionment, making the last employer solely liable. The decision in Australian Conveyor Engineering v Mecha Engineering is not binding authority on this point.
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