On it's whole, it's to give Outlanders a voice and to ensure we're treated fairly with Vallo as a whole. The Vallo Government requested records, but the DOA works to protect exactly how much information people are comfortable giving Vallo, and in exchange for base information, they work with the DOA and Outlanders to give them a place to live, an arrival stipend and jobs.
Name, age and species is requested for an ID and registration, and anything more than that is entirely up to the Outlander themselves.