1) each school will do so differently
2) public schools may have legal statute, formal regulations, school policy, or informal consideration.
3) state residency criteria for admission may be different than what is required for tuition
4) former connection to the state may be sufficient for residency for admission
5) public schools look at residency as a factor of highest importance where private schools considered it of low importance.
6) it is up to applicant to make their "case" for connection to the state either on secondary or in other communication
Legal Residence
The medical school(s) you apply to may be interested in your state and/or county of legal residence
for consideration as part of the application review process. Each state has its own qualifications for
determining legal residency; medical schools may request additional documentation. You are responsible
for researching and understanding a state’s qualifications for legal residency before claiming it as your
state of legal residence in your AMCAS application. It may be possible to qualify for multiple states
of legal residency, but you may select only one in the AMCAS application.