Only 'employees' as defined by the Act are entitled to compensation under that Act.
Section 5 of the SRCA defines 'employee' at length. However, for RCG purposes the only relevant passages are:
Full time and reserves members of the ADF have been employees for the purposes of Commonwealth compensation legislation since 1949 (see below).
Links
[1] https://clik.dva.gov.au/user/login?destination=node/20425%23comment-form