Question: How long does a student have to be at a university in your state before they are allowed to pay instate tuition?
In Florida once they are in residence at the university for one year, they pay instate tuition. Looking at residency requirement for Indiana universities, I also see that after one year they pay in-state tuition.
Once they are beyond their freshman year they can vote legally in Indiana and Florida. Hypothetically they can also vote in their home state if the registrar keeps them on the roll, and they don’t notify the home state registrar.
In Florida the registrars work with the post office and if they see mail going anywhere but to the original registration address, they question the voter by mail, and ask them to confirm that they are still at the original address and in the same precinct.
Much is based on where they graduated high school. For graduate school they must establish a residency and show employment.
Because of a glitch in 2012 (using a state ID - state universities were not excluded ) all students were allowed to vote. That was corrected when it became public knowledge.
As long as they live in university housing they are out of state students. Freshman are required to live on campus. If the move off campus it gets messy My nephews father lives in state but he still would have to be out of state because he graduated in Michigan. (He got a good deal at Michigan State Vet school )