<p>No, it depends on each state’s residency requirements.</p>
<p>In Arizona, you’re only a resident for in-state tuition purposes if you are financially independent and have lived in AZ for a year prior to the beginning of the school year, OR you are a dependent and your parents are Arizona residents. You then have to fill out a petition for residency consideration. (There are other eligibility situations: [Residency</a> Reclassification Survey | Arizona State University](<a href=“http://students.asu.edu/residencyreclassificationsurvey]Residency”>http://students.asu.edu/residencyreclassificationsurvey))</p>
<p>In Montana, you have to be physically present in MT for a year (12 months) without an absence of more than a month (30 days), and you have to take certain actions that show intent to make Montana your permanent residence, such as registering to vote or registering your vehicle in MT, or getting a driver’s license there. You also have to be at least 51% financially independent during that year, meaning that dependents who move to MT can’t claim residency just for living there. And if you were enrolled for more than half-time status during any semester that falls withint that year for establishing residency, you’re considered there primarily for educational purposes and that doesn’t count.
[MSU</a> Online Catalog - Residency Requirements](<a href=“http://www.montana.edu/wwwcat/academic/acad1.html]MSU”>http://www.montana.edu/wwwcat/academic/acad1.html)</p>
<p>In CA you have to have lived there for more than one year, show an intent to establish residency in CA (probably by similar means as MT’s) and demonstrate financial independence (not being claimed on your parents’ taxes for 2 years and having your own income that can support you). There are likewise other things that aren’t necessarily relevant to this discussion"
[University</a> of California - Admissions](<a href=“http://www.universityofcalifornia.edu/admissions/undergrad_adm/ca_residency.html]University”>http://www.universityofcalifornia.edu/admissions/undergrad_adm/ca_residency.html)</p>
<p>So in this case if the parents still live in California, that’s probably the only place that she’s considered a resident. If her parents decided to move to Montana with her, than she’s likely a resident of Montana.</p>