A USI is required for students undertaking nationally recognised training (qualifications, accredited courses, skill sets and units of competency) unless exempt. This includes international students studying in Australia.
International students undertaking a VET course offshore (that is, not in Australia) do not require a USI.
A USI is required for offshore VET students who have an Australian ID, such as Australian expats or residents.
Student from a country other than Australia cannot apply for a USI whilst they are still overseas. These students will be able to apply for a USI as soon as they have entered Australia using their non-Australian passport and Australian visa.