What kind of work does the subclass 400 visa actually allow?

This visa is for highly specialised work that draws on skills, knowledge, or experience that are not readily available in the Australian labour market and that benefit an Australian business or activity.

The work must be non-ongoing, meaning it is short-term and not a continuing role. The visa is not designed for general employment or for filling an ordinary position that could be done by the local workforce.

You should be able to clearly describe the specialised nature of the work and why it requires your particular expertise. Applications that look like ordinary or ongoing employment are at risk of refusal.