89—What constitutes injury and employment
For the purposes of this Division—
(a) "injury", "employer" and "worker" include anything that is within the scope of a corresponding term in the statutory workers compensation scheme of another State; and
(b) the determination of what constitutes employment or whether or not a person is a worker or a worker's employer is to be made on the basis that those concepts include anything that is within the scope of a corresponding concept in the statutory workers compensation scheme of another State.