Applicants for Tier classification must satisfy POI requirements.
Group 2 participants must also prove their relationship to the Group 1 participant.
Factsheet DVA06 Proof of Identify Requirements [2] has information about what documents must be provided to in order to satisfy POI requirements and access to DVA entitlements.
Links
[1] https://clik.dva.gov.au/user/login?destination=comment/reply/21002%23comment-form
[2] http://factsheets.dva.gov.au/factsheets/documents/DVA06%20Proof%20of%20Identity%20Requirements.htm