(1) For the purposes of this Part, gainful work is work for financial gain or reward, whether as an employee, a self - employed person or otherwise, where:
(a) the work involves a substantial degree of personal exertion on the part of the person concerned; and
(b) the work is carried on within or outside Australia.
(2) Subsection (1) is to be ignored in determining the meaning of an expression used in a provision of this Act other than this Part.