[vba616]

I'm not an Australian; it appears the author is, so I'm wondering whether they have issues with their own laws.

The Defence Act 1903, "as amended and in force on 10 June 2019" seems to say that in Australia, everyone from 18-60 is liable to serve in a war:

   "Part IV—Liability to serve in the Defence Force in time of war

   Division 1—Liability to serve

   59  Persons liable to serve in Defence Force in time of war

                   All persons (except those who are exempt from service under this Part or to whom this Part does not apply) who:

                     (a)  have resided in Australia for not less than 6 months; and

                     (c)  have attained the age of 18 years but have not attained the age of 60 years;

   are liable, when called upon under section 60, to serve in the Defence Force."

https://www.legislation.gov.au/Details/C2019C00188